A270880 - cp's OEIS frontend

A270880 Triangle read by rows: T(n,m) is the number of direct-sum decompositions of a finite vector space of dimension n with m blocks over GF(2).

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	3
6	0
7	1
8	28
9	28
10	0
11	1
12	400
13	1680
14	840
15	0
16	1
17	10416
18	168640
19	277760
20	83328
21	0
22	1
23	525792
24	36053248
25	159989760
26	139991040
27	27998208
28	0
29	1
30	51116992
31	17811244032
32	209056841728
33	419919790080
34	227569434624
35	32509919232

[1, 0, 1, 0, 1, 3, 0, 1, 28, 28, 0, 1, 400, 1680, 840, 0, 1, 10416, 168640, 277760, 83328, 0, 1, 525792, 36053248, 159989760, 139991040, 27998208, 0, 1, 51116992, 17811244032, 209056841728, 419919790080, 227569434624, 32509919232]

cp's OEIS Frontend

A270880 Triangle read by rows: T(n,m) is the number of direct-sum decompositions of a finite vector space of dimension n with m blocks over GF(2).

Table of values

List of values