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.

A248838 Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 4 times.

Table of values

n a(n)
1 2
2 6
3 24
4 120
5 718
6 4994
7 39556
8 351320
9 3456742
10 37314126
11 438366374
12 5567209930
13 75995663398
14 1109556555434
15 17252609166736
16 284620418911180
17 4965138989585412
18 91317809653363376
19 1765937111915469414

List of values

[2, 6, 24, 120, 718, 4994, 39556, 351320, 3456742, 37314126, 438366374, 5567209930, 75995663398, 1109556555434, 17252609166736, 284620418911180, 4965138989585412, 91317809653363376, 1765937111915469414]

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

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