A383773 - cp's OEIS frontend

A383773 a(n) = pos(M(n)), where M(n) is the n X n circulant matrix with (row 1) = (1, 2, ... , n), and pos(M(n)) is the positive part of the determinant of M(n); see A380661.

n	a(n)
1	1
2	1
3	36
4	450
5	17550
6	744906
7	47753440
8	3909436192
9	410384120220
10	53323552728000
11	8417606908865220
12	1586195621597483136
13	351735343178101060906
14	90667504180193792086144
15	26884188980472806091900000
16	9086147124746080046118543360
17	3472279409772212369077001352888

[1, 1, 36, 450, 17550, 744906, 47753440, 3909436192, 410384120220, 53323552728000, 8417606908865220, 1586195621597483136, 351735343178101060906, 90667504180193792086144, 26884188980472806091900000, 9086147124746080046118543360, 3472279409772212369077001352888]

cp's OEIS Frontend

A383773 a(n) = pos(M(n)), where M(n) is the n X n circulant matrix with (row 1) = (1, 2, ... , n), and pos(M(n)) is the positive part of the determinant of M(n); see A380661.

Table of values

List of values