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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.

A157456 Expansion of x * (1 - x) / (1 - 16*x + x^2).

Table of values

n a(n)
1 1
2 15
3 239
4 3809
5 60705
6 967471
7 15418831
8 245733825
9 3916322369
10 62415424079
11 994730462895
12 15853271982241
13 252657621252961
14 4026668668065135
15 64174041067789199
16 1022757988416562049
17 16299953773597203585
18 259776502389138695311
19 4140124084452621921391

List of values

[1, 15, 239, 3809, 60705, 967471, 15418831, 245733825, 3916322369, 62415424079, 994730462895, 15853271982241, 252657621252961, 4026668668065135, 64174041067789199, 1022757988416562049, 16299953773597203585, 259776502389138695311, 4140124084452621921391]

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

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