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.

A107118 Numbers that are both centered triangular numbers (A005448) and centered hexagonal numbers (A003215).

Table of values

n a(n)
1 1
2 19
3 631
4 21421
5 727669
6 24719311
7 839728891
8 28526062969
9 969046412041
10 32919051946411
11 1118278719765919
12 37988557420094821
13 1290492673563457981
14 43838762343737476519
15 1489227427013510743651
16 50589893756115627807601
17 1718567160280917834714769

List of values

[1, 19, 631, 21421, 727669, 24719311, 839728891, 28526062969, 969046412041, 32919051946411, 1118278719765919, 37988557420094821, 1290492673563457981, 43838762343737476519, 1489227427013510743651, 50589893756115627807601, 1718567160280917834714769]

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

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