A071304 - cp's OEIS frontend

A071304 a(n) = (1/2) * (number of n X n 0..4 matrices M with MM' mod 5 = I, where M' is the transpose of M and I is the n X n identity matrix).

n	a(n)
1	1
2	4
3	120
4	14400
5	9360000
6	29016000000
7	457002000000000
8	35646156000000000000
9	13946558535000000000000000
10	27230655539587500000000000000000
11	266009466302345390625000000000000000000
12	12987912192212013697265625000000000000000000000

[1, 4, 120, 14400, 9360000, 29016000000, 457002000000000, 35646156000000000000, 13946558535000000000000000, 27230655539587500000000000000000, 266009466302345390625000000000000000000, 12987912192212013697265625000000000000000000000]

cp's OEIS Frontend

A071304 a(n) = (1/2) * (number of n X n 0..4 matrices M with MM' mod 5 = I, where M' is the transpose of M and I is the n X n identity matrix).

Table of values

List of values