A209512 - cp's OEIS frontend

A209512 Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.

n	a(n)
1	57
2	4995
3	2071311
4	4099186545
5	38883961392081
6	1772313933013227273
7	388756746462464273412765
8	410796134340987241848792211659
9	2092643007412378548345728130194640495

[57, 4995, 2071311, 4099186545, 38883961392081, 1772313933013227273, 388756746462464273412765, 410796134340987241848792211659, 2092643007412378548345728130194640495]

cp's OEIS Frontend

A209512 Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.

Table of values

List of values