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.

A257919 The number of combinatorial equivalence classes of n-endomorphisms on a rank-3 semigroup.

Table of values

n a(n)
1 7
2 304
3 9958
4 288280
5 7973053
6 217032088
7 5875893676
8 158794026640
9 4288744989139
10 115807878426592
11 3126918614998354
12 84427755760664680
13 2279557984193621065
14 61548142781949118216
15 1661800549993751359192
16 44868621103769828836000
17 1211452826087259054393631

List of values

[7, 304, 9958, 288280, 7973053, 217032088, 5875893676, 158794026640, 4288744989139, 115807878426592, 3126918614998354, 84427755760664680, 2279557984193621065, 61548142781949118216, 1661800549993751359192, 44868621103769828836000, 1211452826087259054393631]

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

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