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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.

A382842 a(n) = Sum_{k=0..floor(n/2)} (binomial(n,k) * binomial(n-k,k))^3.

Table of values

n a(n)
0 1
1 1
2 9
3 217
4 1945
5 35001
6 764001
7 12079089
8 250222617
9 5424133465
10 107360983009
11 2358751625649
12 52540471866961
13 1147794435985393
14 26151265459123065
15 600227875293254217
16 13779170435209475097
17 322302377797126709913
18 7582484532013652243169
19 179184911648568670363185
20 4275721755296040840336945

List of values

[1, 1, 9, 217, 1945, 35001, 764001, 12079089, 250222617, 5424133465, 107360983009, 2358751625649, 52540471866961, 1147794435985393, 26151265459123065, 600227875293254217, 13779170435209475097, 322302377797126709913, 7582484532013652243169, 179184911648568670363185, 4275721755296040840336945]

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

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