A207864 - cp's OEIS frontend

A207864 Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

n	a(n)
1	1
2	4
3	34
4	500
5	10900
6	322768
7	12297768
8	580849872
9	33093252880
10	2227152575552
11	174131286983712
12	15604440074084672
13	1584856558077903168
14	180712593036822482176
15	22946861101272125055616
16	3222156375409363475703040

[1, 4, 34, 500, 10900, 322768, 12297768, 580849872, 33093252880, 2227152575552, 174131286983712, 15604440074084672, 1584856558077903168, 180712593036822482176, 22946861101272125055616, 3222156375409363475703040]

cp's OEIS Frontend

A207864 Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

Table of values

List of values