A241400 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

7, 28, 97, 480, 1657, 8697, 31654, 92204, 397955, 1440202, 5015494, 20114505, 70074714, 258768285, 999131434, 3471187281, 13084431710, 49495338616, 176036491899, 662243630484, 2450968267032, 8911921597230, 33375847400152

Offset: 1

Author

R. H. Hardin, Apr 20 2014

Keywords

• nonn

Comments

Row 4 of A241397

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..136