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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.

A265147 a(1) = 2, a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square.

Table of values

n a(n)
1 2
2 5
3 29
4 241
5 1809
6 6516
7 27729
8 70281
9 191236
10 537636
11 5052601
12 24352064
13 50491721
14 335176900
15 816286736
16 1584582656
17 5835352241
18 31064957504
19 299026078001
20 368254999225
21 916181280225
22 6283970794161
23 31966212255489
24 247575988078441
25 558234718638336
26 4773574731628096

List of values

[2, 5, 29, 241, 1809, 6516, 27729, 70281, 191236, 537636, 5052601, 24352064, 50491721, 335176900, 816286736, 1584582656, 5835352241, 31064957504, 299026078001, 368254999225, 916181280225, 6283970794161, 31966212255489, 247575988078441, 558234718638336, 4773574731628096]

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

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