cp's OEIS Frontend

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.

A306561 Square numbers that are also central polygonal numbers (i.e., square numbers found in the Lazy Caterer's sequence).

Table of values

n a(n)
1 1
2 4
3 16
4 121
5 529
6 4096
7 17956
8 139129
9 609961
10 4726276
11 20720704
12 160554241
13 703893961
14 5454117904
15 23911673956
16 185279454481
17 812293020529
18 6294047334436
19 27594051024016
20 213812329916329
21 937385441796001
22 7263325169820736
23 31843510970040004

List of values

[1, 4, 16, 121, 529, 4096, 17956, 139129, 609961, 4726276, 20720704, 160554241, 703893961, 5454117904, 23911673956, 185279454481, 812293020529, 6294047334436, 27594051024016, 213812329916329, 937385441796001, 7263325169820736, 31843510970040004]

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

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