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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.

A239381 a(0) = 3, the least length of a Primitive Pythagorean Triangle (PPT). a(n) is the least hypotenuse of a PPT which has a(n-1) as one of its legs.

Table of values

n a(n)
0 3
1 5
2 13
3 85
4 157
5 12325
6 90733
7 2449525
8 28455997
9 295742792965
10 171480834409967437
11 656310093705697045
12 1616599508725767821225590944157
13 4461691012090851100342993272805
14 115366949386695884000892071602798585632943213
15 12002377162350258332845595301471273220420939451301220405

List of values

[3, 5, 13, 85, 157, 12325, 90733, 2449525, 28455997, 295742792965, 171480834409967437, 656310093705697045, 1616599508725767821225590944157, 4461691012090851100342993272805, 115366949386695884000892071602798585632943213, 12002377162350258332845595301471273220420939451301220405]

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

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