A240403 Number of nX4 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 zero plus the sum of the elements diagonally to its northwest, modulo 4.

4, 24, 235, 1304, 13648, 98837, 692520, 6686074, 47001423, 368795251, 3172886576, 22843492846, 188803534301, 1516806583206, 11402126592178, 94073248811059, 733120766691045, 5706868084005386, 46267999865467117, 358824411389642466

Offset: 1

Author

R. H. Hardin, Apr 04 2014

Keywords

• nonn

Comments

Column 4 of A240406

Examples

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

Links

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