A378666 - cp's OEIS frontend

A378666 Triangular array read by rows: T(n,k) is the number of n X n idempotent matrices over GF(3) having rank k, n>=0, 0<=k<=n.

n	a(n)
0	1
1	1
2	1
3	1
4	12
5	1
6	1
7	117
8	117
9	1
10	1
11	1080
12	10530
13	1080
14	1
15	1
16	9801
17	882090
18	882090
19	9801
20	1
21	1
22	88452
23	72243171
24	666860040
25	72243171
26	88452
27	1
28	1
29	796797
30	5873190687
31	491992666011
32	491992666011
33	5873190687
34	796797
35	1
36	1
37	7173360
38	476309310660
39	360089838858960
40	3267815287645062
41	360089838858960
42	476309310660
43	7173360
44	1

[1, 1, 1, 1, 12, 1, 1, 117, 117, 1, 1, 1080, 10530, 1080, 1, 1, 9801, 882090, 882090, 9801, 1, 1, 88452, 72243171, 666860040, 72243171, 88452, 1, 1, 796797, 5873190687, 491992666011, 491992666011, 5873190687, 796797, 1, 1, 7173360, 476309310660, 360089838858960, 3267815287645062, 360089838858960, 476309310660, 7173360, 1]

cp's OEIS Frontend

A378666 Triangular array read by rows: T(n,k) is the number of n X n idempotent matrices over GF(3) having rank k, n>=0, 0<=k<=n.

Table of values

List of values