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.

A180313 A sequence a(n) such that a(n+1)^2 - a(n)^2 are perfect squares.

Table of values

n a(n)
1 3
2 5
3 13
4 85
5 221
6 1445
7 3757
8 24565
9 63869
10 417605
11 1085773
12 7099285
13 18458141
14 120687845
15 313788397
16 2051693365
17 5334402749
18 34878787205
19 90684846733
20 592939382485
21 1541642394461
22 10079969502245
23 26207920705837
24 171359481538165
25 445534651999229
26 2913111186148805

List of values

[3, 5, 13, 85, 221, 1445, 3757, 24565, 63869, 417605, 1085773, 7099285, 18458141, 120687845, 313788397, 2051693365, 5334402749, 34878787205, 90684846733, 592939382485, 1541642394461, 10079969502245, 26207920705837, 171359481538165, 445534651999229, 2913111186148805]

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

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