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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.

A323209 a(n) = hypergeometric([-n, n + 1], [-n - 1], n).

Table of values

n a(n)
0 1
1 2
2 13
3 190
4 4641
5 161376
6 7312789
7 409186310
8 27272680705
9 2110472708140
10 186023930383501
11 18401769878685172
12 2018938571514794593
13 243319689384354960300
14 31955654188732155634341
15 4542582850906442990797126
16 694922224386422689648830465

List of values

[1, 2, 13, 190, 4641, 161376, 7312789, 409186310, 27272680705, 2110472708140, 186023930383501, 18401769878685172, 2018938571514794593, 243319689384354960300, 31955654188732155634341, 4542582850906442990797126, 694922224386422689648830465]

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

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