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.

A280111 Indices of triangular numbers (A000217) that are also centered 10-gonal numbers (A062786).

Table of values

n a(n)
1 1
2 58
3 2221
4 84358
5 3203401
6 121644898
7 4619302741
8 175411859278
9 6661031349841
10 252943779434698
11 9605202587168701
12 364744754532975958
13 13850695469665917721
14 525961683092771897458
15 19972693262055666185701
16 758436382275022543159198
17 28800609833188800973863841

List of values

[1, 58, 2221, 84358, 3203401, 121644898, 4619302741, 175411859278, 6661031349841, 252943779434698, 9605202587168701, 364744754532975958, 13850695469665917721, 525961683092771897458, 19972693262055666185701, 758436382275022543159198, 28800609833188800973863841]

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

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