A095421 - cp's OEIS frontend

A095421 Triangle read by rows: T(n,m) = number of m-block proper covers (without empty blocks and without multiple blocks) of a labeled n-set (n>=2, 2<=m<=2^n-2).

n	a(n)
2	1
3	6
4	17
5	15
6	6
7	1
8	25
9	230
10	861
11	1918
12	2975
13	3428
14	3003
15	2002
16	1001
17	364
18	91
19	14
20	1
21	90
22	2125
23	20930
24	127701
25	568820
26	2003635
27	5820750
28	14282125
29	30030000
30	54620475
31	86490950
32	119759325
33	145422600
34	155117515
35	145422675
36	119759850
37	86493225

[1, 6, 17, 15, 6, 1, 25, 230, 861, 1918, 2975, 3428, 3003, 2002, 1001, 364, 91, 14, 1, 90, 2125, 20930, 127701, 568820, 2003635, 5820750, 14282125, 30030000, 54620475, 86490950, 119759325, 145422600, 155117515, 145422675, 119759850, 86493225]

cp's OEIS Frontend

A095421 Triangle read by rows: T(n,m) = number of m-block proper covers (without empty blocks and without multiple blocks) of a labeled n-set (n>=2, 2<=m<=2^n-2).

Table of values

List of values