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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.

A209428 a(n) = Sum_{k=0..[n/2]} binomial(n-k,k)^(n-k).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 29
5 284
6 4423
7 146913
8 12314170
9 1881868883
10 442540106327
11 198351607585964
12 242843144659704443
13 641109494638274737567
14 2641514784666925880476348
15 17914201815999230497003603969
16 302266027138470510426936352722523

List of values

[1, 1, 2, 5, 29, 284, 4423, 146913, 12314170, 1881868883, 442540106327, 198351607585964, 242843144659704443, 641109494638274737567, 2641514784666925880476348, 17914201815999230497003603969, 302266027138470510426936352722523]

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

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