A207978 - cp's OEIS frontend

A207978 Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).

n	a(n)
0	1
1	2
2	7
3	67
4	1080
5	25287
6	794545
7	31858034
8	1573857867
9	93345011951
10	6514819011216
11	526593974392123
12	48658721593531669
13	5084549201524804642
14	595348294459678745663
15	77500341343460209843627
16	11140107960738185817545800
17	1757660562895916320583653791

[1, 2, 7, 67, 1080, 25287, 794545, 31858034, 1573857867, 93345011951, 6514819011216, 526593974392123, 48658721593531669, 5084549201524804642, 595348294459678745663, 77500341343460209843627, 11140107960738185817545800, 1757660562895916320583653791]

cp's OEIS Frontend

A207978 Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

List of values