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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.

A053318 a(n) contains n digits (either '2' or '7') and is divisible by 2^n.

Table of values

n a(n)
1 2
2 72
3 272
4 2272
5 22272
6 222272
7 7222272
8 27222272
9 727222272
10 2727222272
11 72727222272
12 772727222272
13 7772727222272
14 77772727222272
15 277772727222272
16 2277772727222272
17 72277772727222272
18 272277772727222272

List of values

[2, 72, 272, 2272, 22272, 222272, 7222272, 27222272, 727222272, 2727222272, 72727222272, 772727222272, 7772727222272, 77772727222272, 277772727222272, 2277772727222272, 72277772727222272, 272277772727222272]

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

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