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.

A268870 Number of sequences in {1,...,n}^n with longest increasing subsequence of length three.

Table of values

n a(n)
3 1
4 45
5 1131
6 23611
7 461154
8 8837823
9 169844455
10 3307239364
11 65559881608
12 1325285983528
13 27321430823064
14 573932303529170
15 12269791047231748
16 266575464412874571
17 5877527995117635663
18 131334452330324176828
19 2970563969803965041900
20 67935408457473145627500

List of values

[1, 45, 1131, 23611, 461154, 8837823, 169844455, 3307239364, 65559881608, 1325285983528, 27321430823064, 573932303529170, 12269791047231748, 266575464412874571, 5877527995117635663, 131334452330324176828, 2970563969803965041900, 67935408457473145627500]

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

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