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.

A111766 Numbers occurring in three Pythagorean triples of the form: odd: a, (a^2-1)/2, (a^2+1)/2 or even: a, a^2/4-1, a^2/4+1.

Table of values

n a(n)
1 0
2 5
3 24
4 145
5 840
6 4901
7 28560
8 166465
9 970224
10 5654885
11 32959080
12 192099601
13 1119638520
14 6525731525
15 38034750624
16 221682772225
17 1292061882720
18 7530688524101
19 43892069261880
20 255821727047185
21 1491038293021224
22 8690408031080165
23 50651409893459760

List of values

[0, 5, 24, 145, 840, 4901, 28560, 166465, 970224, 5654885, 32959080, 192099601, 1119638520, 6525731525, 38034750624, 221682772225, 1292061882720, 7530688524101, 43892069261880, 255821727047185, 1491038293021224, 8690408031080165, 50651409893459760]

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

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