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.

A225725 Triangle of transformation semigroup sizes generated by a single element.

Table of values

n a(n)
0 1
1 1
2 3
3 1
4 10
5 15
6 2
7 41
8 129
9 80
10 6
11 196
12 1115
13 1260
14 510
15 24
16 20
17 1057
18 10395
19 17780
20 12840
21 3744
22 840
23 6322
24 105315
25 258510
26 264810
27 135492
28 47250
29 4920
30 0
31 0
32 504
33 0
34 420
35 41393
36 1160635
37 4018000
38 5318180
39 3788400
40 1837024
41 513120
42 38640
43 0
44 32256
45 0
46 26880
47 0
48 0
49 2688

List of values

[1, 1, 3, 1, 10, 15, 2, 41, 129, 80, 6, 196, 1115, 1260, 510, 24, 20, 1057, 10395, 17780, 12840, 3744, 840, 6322, 105315, 258510, 264810, 135492, 47250, 4920, 0, 0, 504, 0, 420, 41393, 1160635, 4018000, 5318180, 3788400, 1837024, 513120, 38640, 0, 32256, 0, 26880, 0, 0, 2688]