A081623 - cp's OEIS frontend

A081623 Number of ways in which the points on an n X n square lattice can be equally occupied with spin "up" and spin "down" particles. If n is odd, we arbitrarily take the lattice to contain one more spin "up" particle than the number of spin "down" particles.

n	a(n)
0	1
1	1
2	6
3	126
4	12870
5	5200300
6	9075135300
7	63205303218876
8	1832624140942590534
9	212392290424395860814420
10	100891344545564193334812497256
11	191645966716130525165099506263706416
12	1480212998448786189993816895482588794876100

[1, 1, 6, 126, 12870, 5200300, 9075135300, 63205303218876, 1832624140942590534, 212392290424395860814420, 100891344545564193334812497256, 191645966716130525165099506263706416, 1480212998448786189993816895482588794876100]

cp's OEIS Frontend

A081623 Number of ways in which the points on an n X n square lattice can be equally occupied with spin "up" and spin "down" particles. If n is odd, we arbitrarily take the lattice to contain one more spin "up" particle than the number of spin "down" particles.

Table of values

List of values