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.

A104240 Nonnegative integers n such that 13*n^2 + 13*n + 1 is a square.

Table of values

n a(n)
0 0
1 7
2 144
3 504
4 9727
5 187560
6 654840
7 12626287
8 243453384
9 849982464
10 16388911447
11 316002305520
12 1103276584080
13 21272794432567
14 410170749112224
15 1432052156154024
16 27612070784561167
17 532401316345361880
18 1858802595411339720
19 35840446605565962847

List of values

[0, 7, 144, 504, 9727, 187560, 654840, 12626287, 243453384, 849982464, 16388911447, 316002305520, 1103276584080, 21272794432567, 410170749112224, 1432052156154024, 27612070784561167, 532401316345361880, 1858802595411339720, 35840446605565962847]

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

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