A055154 - cp's OEIS frontend

A055154 Triangle read by rows: T(n,k) = number of k-covers of a labeled n-set, k=1..2^n-1.

n	a(n)
1	1
2	1
3	3
4	1
5	1
6	12
7	32
8	35
9	21
10	7
11	1
12	1
13	39
14	321
15	1225
16	2919
17	4977
18	6431
19	6435
20	5005
21	3003
22	1365
23	455
24	105
25	15
26	1
27	1
28	120
29	2560
30	24990
31	155106
32	711326
33	2597410
34	7856550
35	20135050
36	44337150
37	84665490
38	141118250
39	206252550
40	265182450
41	300540190

[1, 1, 3, 1, 1, 12, 32, 35, 21, 7, 1, 1, 39, 321, 1225, 2919, 4977, 6431, 6435, 5005, 3003, 1365, 455, 105, 15, 1, 1, 120, 2560, 24990, 155106, 711326, 2597410, 7856550, 20135050, 44337150, 84665490, 141118250, 206252550, 265182450, 300540190]

cp's OEIS Frontend

A055154 Triangle read by rows: T(n,k) = number of k-covers of a labeled n-set, k=1..2^n-1.

Table of values

List of values