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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.

A346766 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(5*k,k) / (4*k + 1).

Table of values

n a(n)
0 1
1 1
2 6
3 51
4 531
5 6331
6 83532
7 1195452
8 18316582
9 297727712
10 5099398853
11 91554269703
12 1715910362408
13 33457504204403
14 676778172939139
15 14168046060375184
16 306327815585165519
17 6827996259530724139
18 156654003923243040925
19 3694188118839057258940
20 89428870506038692255920

List of values

[1, 1, 6, 51, 531, 6331, 83532, 1195452, 18316582, 297727712, 5099398853, 91554269703, 1715910362408, 33457504204403, 676778172939139, 14168046060375184, 306327815585165519, 6827996259530724139, 156654003923243040925, 3694188118839057258940, 89428870506038692255920]

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

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