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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.

A181083 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k,k)^n * n/(n-k).

Table of values

n a(n)
1 1
2 3
3 13
4 111
5 1686
6 88737
7 14355265
8 3583775847
9 1789371713317
10 4311992850152298
11 23667113846872049808
12 185391762466214524964649
13 4305238471804328835068596175
14 468653724243371951619336632177235

List of values

[1, 3, 13, 111, 1686, 88737, 14355265, 3583775847, 1789371713317, 4311992850152298, 23667113846872049808, 185391762466214524964649, 4305238471804328835068596175, 468653724243371951619336632177235]

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

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