A240457 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

8, 89, 874, 8187, 75167, 682018, 6147372, 55212526, 494809053, 4428808128, 39611173178, 354127003547, 3165102684053, 28284608888395, 252739519980209, 2258253806476180, 20177086997089514, 180275181902738316

Offset: 1

Author

R. H. Hardin, Apr 05 2014

Keywords

• nonn

Comments

Column 3 of A240460

Examples

			Some solutions for n=4
..2..0..0....2..2..2....0..0..2....0..2..2....0..2..0....2..0..2....0..0..0
..3..1..0....0..0..0....0..0..2....2..0..0....0..2..2....2..0..0....2..0..0
..2..1..2....0..2..2....2..2..0....0..0..2....2..2..0....2..1..2....0..0..0
..0..0..0....0..2..0....0..0..0....0..2..1....2..2..0....0..2..1....2..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210