cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A257299 Numbers n for which each of the digits 0-9 appears exactly once as first digit in the orbit of n under iterations of n -> (first digit of n)*(n with first digit removed) until a single digit is reached; no leading zeros allowed.

Table of values

n a(n)
1 9848
2 51948
3 56648
4 68648
5 77712
6 84157
7 87207
8 98142
9 98642
10 249217
11 298242
12 325803
13 328957
14 381082
15 383003
16 423027
17 461992
18 516957
19 549492
20 721712
21 796523
22 812157
23 879707
24 925492
25 945992
26 948742
27 950742
28 960492
29 1248242
30 1957313
31 2211992
32 2259492
33 2282707

List of values

[9848, 51948, 56648, 68648, 77712, 84157, 87207, 98142, 98642, 249217, 298242, 325803, 328957, 381082, 383003, 423027, 461992, 516957, 549492, 721712, 796523, 812157, 879707, 925492, 945992, 948742, 950742, 960492, 1248242, 1957313, 2211992, 2259492, 2282707]