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.

A376640 Number of equational laws for magmas involving n operations, up to relabeling and symmetry, after removing nontrivial reflexive laws.

Table of values

n a(n)
0 2
1 5
2 39
3 364
4 4284
5 57882
6 888365
7 15120105
8 281941490
9 5698630860
10 123850391756
11 2875187314622
12 70909556459276
13 1849319825544900
14 50801676936624147
15 1464954360561398340
16 44213852151883887000
17 1392971702129279452950
18 45705100441642892335954
19 1558551328538087579977710

List of values

[2, 5, 39, 364, 4284, 57882, 888365, 15120105, 281941490, 5698630860, 123850391756, 2875187314622, 70909556459276, 1849319825544900, 50801676936624147, 1464954360561398340, 44213852151883887000, 1392971702129279452950, 45705100441642892335954, 1558551328538087579977710]

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

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