A383775 - cp's OEIS frontend

A383775 a(n) = pos(M(n)), where M(n) is the n X n left 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	18
4	610
5	17550
6	744906
7	47282844
8	3918873376
9	410384120220
10	53323552728000
11	8417451284317614
12	1586200451151892608
13	351735343178101060906
14	90667504180193792086144
15	26884188746929397888775000
16	9086147134545912835276742656
17	3472279409772212369077001352888

[1, 1, 18, 610, 17550, 744906, 47282844, 3918873376, 410384120220, 53323552728000, 8417451284317614, 1586200451151892608, 351735343178101060906, 90667504180193792086144, 26884188746929397888775000, 9086147134545912835276742656, 3472279409772212369077001352888]

cp's OEIS Frontend

A383775 a(n) = pos(M(n)), where M(n) is the n X n left 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