A079175 - cp's OEIS frontend

A079175 Number of isomorphism classes of associative closed binary operations (semigroups) on a set of order n, listed by class size.

n	a(n)
0	1
1	1
2	2
3	3
4	2
5	0
6	7
7	15
8	2
9	0
10	0
11	7
12	5
13	0
14	62
15	112
16	2
17	0
18	0
19	0
20	6
21	0
22	0
23	8
24	0
25	2
26	51
27	0
28	47
29	2
30	576
31	1221
32	2
33	0
34	0
35	0
36	0
37	6
38	0
39	0
40	0
41	0
42	8
43	0
44	0
45	4
46	0
47	48
48	0
49	0
50	0
51	0
52	92
53	0
54	0
55	42
56	506
57	0
58	813
59	32
60	7397
61	19684
62	2
63	0
64	0
65	0
66	0
67	0
68	6
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	8

[1, 1, 2, 3, 2, 0, 7, 15, 2, 0, 0, 7, 5, 0, 62, 112, 2, 0, 0, 0, 6, 0, 0, 8, 0, 2, 51, 0, 47, 2, 576, 1221, 2, 0, 0, 0, 0, 6, 0, 0, 0, 0, 8, 0, 0, 4, 0, 48, 0, 0, 0, 0, 92, 0, 0, 42, 506, 0, 813, 32, 7397, 19684, 2, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8]

cp's OEIS Frontend

A079175 Number of isomorphism classes of associative closed binary operations (semigroups) on a set of order n, listed by class size.

Table of values

List of values