A344873 - cp's OEIS frontend

A344873 Irregular triangle read by rows. T(n,k) is the number of n X n matrices over GF(2) whose characteristic polynomial is a product of k distinct squarefree irreducible factors.

n	a(n)
0	1
1	0
2	2
3	0
4	2
5	6
6	0
7	48
8	112
9	0
10	4032
11	11520
12	6720
13	0
14	1935360
15	4952064
16	2856960
17	0
18	2879815680
19	9558687744
20	7871496192
21	0
22	23222833643520
23	66748107718656
24	60247322394624
25	15604761231360
26	0
27	629183972848435200
28	2137709262359494656
29	2101670528396820480
30	465681743169454080

[1, 0, 2, 0, 2, 6, 0, 48, 112, 0, 4032, 11520, 6720, 0, 1935360, 4952064, 2856960, 0, 2879815680, 9558687744, 7871496192, 0, 23222833643520, 66748107718656, 60247322394624, 15604761231360, 0, 629183972848435200, 2137709262359494656, 2101670528396820480, 465681743169454080]

cp's OEIS Frontend

A344873 Irregular triangle read by rows. T(n,k) is the number of n X n matrices over GF(2) whose characteristic polynomial is a product of k distinct squarefree irreducible factors.

Table of values

List of values