cp's OEIS Frontend

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.

A264409 a(n) = Sum_{k=0..n} binomial(n, k) * binomial((n-k)*k, k).

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 53
5 376
6 3187
7 31312
8 348833
9 4318804
10 58583231
11 862021084
12 13650998473
13 231123405124
14 4160680867085
15 79272259679386
16 1592221255517713
17 33599025754872240
18 742661269363444447
19 17149370461633306924
20 412742027009797487561
21 10331628852664232678356
22 268469799828424474556585
23 7229580560131818394109850
24 201438863633591604857727001

List of values

[1, 1, 3, 10, 53, 376, 3187, 31312, 348833, 4318804, 58583231, 862021084, 13650998473, 231123405124, 4160680867085, 79272259679386, 1592221255517713, 33599025754872240, 742661269363444447, 17149370461633306924, 412742027009797487561, 10331628852664232678356, 268469799828424474556585, 7229580560131818394109850, 201438863633591604857727001]

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

Content is available under The OEIS End-User License Agreement.