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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.

A386567 a(n) = Sum_{k=0..n-1} binomial(6*k-1,k) * binomial(6*n-6*k,n-k-1).

Table of values

n a(n)
0 0
1 1
2 17
3 268
4 4129
5 62955
6 954392
7 14417376
8 217279857
9 3269099590
10 49125066135
11 737516631908
12 11064270530632
13 165889863957065
14 2486052264852180
15 37241727274394640
16 557707191712371729
17 8349517132932620730
18 124971965902300790390
19 1870139909398530770760

List of values

[0, 1, 17, 268, 4129, 62955, 954392, 14417376, 217279857, 3269099590, 49125066135, 737516631908, 11064270530632, 165889863957065, 2486052264852180, 37241727274394640, 557707191712371729, 8349517132932620730, 124971965902300790390, 1870139909398530770760]

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

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