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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.

A091759 a(n) = 0^n + 2((n+1)^n - (-1)^n) / (n+2).

Table of values

n a(n)
0 1
1 2
2 4
3 26
4 208
5 2222
6 29412
7 466034
8 8609344
9 181818182
10 4322904100
11 114308980106
12 3328297874640
13 105828636433886
14 3649115753173828
15 135637824071393762
16 5406799097296318720
17 230095953656704898102

List of values

[1, 2, 4, 26, 208, 2222, 29412, 466034, 8609344, 181818182, 4322904100, 114308980106, 3328297874640, 105828636433886, 3649115753173828, 135637824071393762, 5406799097296318720, 230095953656704898102]

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

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