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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.

A309072 a(n) is the concatenation of the initial digit of A247476(k) for k = A309063(n)..A309063(n+1)-1.

Table of values

n a(n)
1 12132453674859161724822942
2 121121
3 121121
4 2342536434553643455364345536436553789651617788966917178682392737988131273298
5 78912142738493
6 912112112192
7 121121
8 121121
9 121121
10 121121
11 121121
12 121121
13 121121
14 121121
15 121121
16 121121
17 121121
18 121121
19 121121

List of values

[12132453674859161724822942, 121121, 121121, 2342536434553643455364345536436553789651617788966917178682392737988131273298, 78912142738493, 912112112192, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121, 121121]

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

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