A058160 - cp's OEIS frontend

A058160 Triangle read by rows: T(n,k) is the number of labeled commutative monoids of order n with k idempotents and a fixed identity.

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	2
7	4
8	45
9	36
10	9
11	6
12	408
13	648
14	348
15	76
16	60
17	7195
18	13500
19	11790
20	5280
21	1065
22	120
23	200016
24	369930
25	425280
26	293640
27	118890
28	22566
29	1920
30	13811077
31	14716716
32	18035745
33	16347660
34	9953265
35	3750516
36	674611
37	7560
38	3405271616
39	1024787568
40	971651856
41	999666920
42	794967600
43	445001424
44	157962168
45	27019896

[1, 1, 1, 1, 6, 2, 4, 45, 36, 9, 6, 408, 648, 348, 76, 60, 7195, 13500, 11790, 5280, 1065, 120, 200016, 369930, 425280, 293640, 118890, 22566, 1920, 13811077, 14716716, 18035745, 16347660, 9953265, 3750516, 674611, 7560, 3405271616, 1024787568, 971651856, 999666920, 794967600, 445001424, 157962168, 27019896]

cp's OEIS Frontend

A058160 Triangle read by rows: T(n,k) is the number of labeled commutative monoids of order n with k idempotents and a fixed identity.

Table of values

List of values