Integers 1–500 in radix 20. Colored by multiplicative persistence (max 6 in this range).
Smallest number with persistence k:
k |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
smallest |
1 |
10 |
2a |
3h |
6d |
7j |
di |
count |
19 |
142 |
150 |
120 |
56 |
11 |
2 |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
|
| 0 | 1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
a
|
b
|
c
|
d
|
e
|
f
|
g
|
h
|
i
|
j
|
10
|
11
|
12
|
13
|
14
|
15
|
| 25 | 16
|
17
|
18
|
19
|
1a
|
1b
|
1c
|
1d
|
1e
|
1f
|
1g
|
1h
|
1i
|
1j
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
2a
|
| 50 | 2b
|
2c
|
2d
|
2e
|
2f
|
2g
|
2h
|
2i
|
2j
|
30
|
31
|
32
|
33
|
34
|
35
|
36
|
37
|
38
|
39
|
3a
|
3b
|
3c
|
3d
|
3e
|
3f
|
| 75 | 3g
|
3h
|
3i
|
3j
|
40
|
41
|
42
|
43
|
44
|
45
|
46
|
47
|
48
|
49
|
4a
|
4b
|
4c
|
4d
|
4e
|
4f
|
4g
|
4h
|
4i
|
4j
|
50
|
| 100 | 51
|
52
|
53
|
54
|
55
|
56
|
57
|
58
|
59
|
5a
|
5b
|
5c
|
5d
|
5e
|
5f
|
5g
|
5h
|
5i
|
5j
|
60
|
61
|
62
|
63
|
64
|
65
|
| 125 | 66
|
67
|
68
|
69
|
6a
|
6b
|
6c
|
6d
|
6e
|
6f
|
6g
|
6h
|
6i
|
6j
|
70
|
71
|
72
|
73
|
74
|
75
|
76
|
77
|
78
|
79
|
7a
|
| 150 | 7b
|
7c
|
7d
|
7e
|
7f
|
7g
|
7h
|
7i
|
7j
|
80
|
81
|
82
|
83
|
84
|
85
|
86
|
87
|
88
|
89
|
8a
|
8b
|
8c
|
8d
|
8e
|
8f
|
| 175 | 8g
|
8h
|
8i
|
8j
|
90
|
91
|
92
|
93
|
94
|
95
|
96
|
97
|
98
|
99
|
9a
|
9b
|
9c
|
9d
|
9e
|
9f
|
9g
|
9h
|
9i
|
9j
|
a0
|
| 200 | a1
|
a2
|
a3
|
a4
|
a5
|
a6
|
a7
|
a8
|
a9
|
aa
|
ab
|
ac
|
ad
|
ae
|
af
|
ag
|
ah
|
ai
|
aj
|
b0
|
b1
|
b2
|
b3
|
b4
|
b5
|
| 225 | b6
|
b7
|
b8
|
b9
|
ba
|
bb
|
bc
|
bd
|
be
|
bf
|
bg
|
bh
|
bi
|
bj
|
c0
|
c1
|
c2
|
c3
|
c4
|
c5
|
c6
|
c7
|
c8
|
c9
|
ca
|
| 250 | cb
|
cc
|
cd
|
ce
|
cf
|
cg
|
ch
|
ci
|
cj
|
d0
|
d1
|
d2
|
d3
|
d4
|
d5
|
d6
|
d7
|
d8
|
d9
|
da
|
db
|
dc
|
dd
|
de
|
df
|
| 275 | dg
|
dh
|
di
|
dj
|
e0
|
e1
|
e2
|
e3
|
e4
|
e5
|
e6
|
e7
|
e8
|
e9
|
ea
|
eb
|
ec
|
ed
|
ee
|
ef
|
eg
|
eh
|
ei
|
ej
|
f0
|
| 300 | f1
|
f2
|
f3
|
f4
|
f5
|
f6
|
f7
|
f8
|
f9
|
fa
|
fb
|
fc
|
fd
|
fe
|
ff
|
fg
|
fh
|
fi
|
fj
|
g0
|
g1
|
g2
|
g3
|
g4
|
g5
|
| 325 | g6
|
g7
|
g8
|
g9
|
ga
|
gb
|
gc
|
gd
|
ge
|
gf
|
gg
|
gh
|
gi
|
gj
|
h0
|
h1
|
h2
|
h3
|
h4
|
h5
|
h6
|
h7
|
h8
|
h9
|
ha
|
| 350 | hb
|
hc
|
hd
|
he
|
hf
|
hg
|
hh
|
hi
|
hj
|
i0
|
i1
|
i2
|
i3
|
i4
|
i5
|
i6
|
i7
|
i8
|
i9
|
ia
|
ib
|
ic
|
id
|
ie
|
if
|
| 375 | ig
|
ih
|
ii
|
ij
|
j0
|
j1
|
j2
|
j3
|
j4
|
j5
|
j6
|
j7
|
j8
|
j9
|
ja
|
jb
|
jc
|
jd
|
je
|
jf
|
jg
|
jh
|
ji
|
jj
|
100
|
| 400 | 101
|
102
|
103
|
104
|
105
|
106
|
107
|
108
|
109
|
10a
|
10b
|
10c
|
10d
|
10e
|
10f
|
10g
|
10h
|
10i
|
10j
|
110
|
111
|
112
|
113
|
114
|
115
|
| 425 | 116
|
117
|
118
|
119
|
11a
|
11b
|
11c
|
11d
|
11e
|
11f
|
11g
|
11h
|
11i
|
11j
|
120
|
121
|
122
|
123
|
124
|
125
|
126
|
127
|
128
|
129
|
12a
|
| 450 | 12b
|
12c
|
12d
|
12e
|
12f
|
12g
|
12h
|
12i
|
12j
|
130
|
131
|
132
|
133
|
134
|
135
|
136
|
137
|
138
|
139
|
13a
|
13b
|
13c
|
13d
|
13e
|
13f
|
| 475 | 13g
|
13h
|
13i
|
13j
|
140
|
141
|
142
|
143
|
144
|
145
|
146
|
147
|
148
|
149
|
14a
|
14b
|
14c
|
14d
|
14e
|
14f
|
14g
|
14h
|
14i
|
14j
|
150
|