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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.

A067634 a(1) = 1; string of digits of a(n)^2 is a substring of the string of digits of a(n+1)^2.

Table of values

n a(n)
1 1
2 4
3 13
4 130
5 1300
6 13000
7 130000
8 1300000
9 13000000
10 130000000
11 1300000000
12 13000000000
13 130000000000
14 1300000000000
15 13000000000000
16 130000000000000
17 1300000000000000
18 13000000000000000
19 130000000000000000

List of values

[1, 4, 13, 130, 1300, 13000, 130000, 1300000, 13000000, 130000000, 1300000000, 13000000000, 130000000000, 1300000000000, 13000000000000, 130000000000000, 1300000000000000, 13000000000000000, 130000000000000000]

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

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