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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.

A337770 a(0)=1; a(n) is the leading digit of a(n-1) multiplied by n concatenated with the remaining digits of a(n-1).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 104
6 604
7 4204
8 32204
9 272204
10 2072204
11 22072204
12 242072204
13 2642072204
14 28642072204
15 308642072204
16 4808642072204
17 68808642072204
18 1088808642072204
19 19088808642072204
20 209088808642072204
21 4209088808642072204
22 88209088808642072204

List of values

[1, 1, 2, 6, 24, 104, 604, 4204, 32204, 272204, 2072204, 22072204, 242072204, 2642072204, 28642072204, 308642072204, 4808642072204, 68808642072204, 1088808642072204, 19088808642072204, 209088808642072204, 4209088808642072204, 88209088808642072204]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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