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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.

A181085 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k,k)^(n+1) * n/(n-k).

Table of values

n a(n)
1 1
2 3
3 25
4 327
5 6336
6 513657
7 142074241
8 52903930911
9 36806786795365
10 148308705637730728
11 1318954828711012426638
12 15279013243159345043036553
13 534104982404807772659968455891
14 97749134742042348389685885848315523

List of values

[1, 3, 25, 327, 6336, 513657, 142074241, 52903930911, 36806786795365, 148308705637730728, 1318954828711012426638, 15279013243159345043036553, 534104982404807772659968455891, 97749134742042348389685885848315523]

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

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