A240270 Number of nX6 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

132, 3263, 64721, 2059061, 40760821, 1063706501, 27923918285, 576407548906, 15326042676144, 369518944004863, 8336460134026971, 218307022801923486, 5056252479593806048, 120075470956639787034, 3035930439648129383298

Offset: 1

Author

R. H. Hardin, Apr 03 2014

Keywords

• nonn

Comments

Column 6 of A240271

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18