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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.

A323768 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k,k)^k.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 5
5 14
6 43
7 171
8 1234
9 9075
10 94295
11 1685324
12 28688843
13 804627839
14 34189166176
15 1379425012899
16 106952499421507
17 10394354507270548
18 1052079100669253203
19 221582922117645427461
20 48152920476428200426258
21 13152336142340905111739041

List of values

[1, 1, 2, 3, 5, 14, 43, 171, 1234, 9075, 94295, 1685324, 28688843, 804627839, 34189166176, 1379425012899, 106952499421507, 10394354507270548, 1052079100669253203, 221582922117645427461, 48152920476428200426258, 13152336142340905111739041]

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

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