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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.

A171617 a(n)=k is the smallest exponent of N=2^k of first prime(1)=2 where at least 5 equal decimal digits "n n n n n" appear in the decimal representation of N (n=0,1,...9).

Table of values

n a(n)
0 1491
1 485
2 314
3 221
4 315
5 973
6 220
7 317
8 316
9 422

List of values

[1491, 485, 314, 221, 315, 973, 220, 317, 316, 422]

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