A200464 Number of 0..3 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 4.

4, 10, 26, 69, 181, 455, 1120, 2794, 6955, 17254, 42770, 105825, 262026, 648672, 1605786, 3974375, 9835789, 24343416, 60250311, 149117782, 369056036, 913396093, 2260628044, 5594995167, 13847440350, 34272006253, 84822308047, 209933077581

Offset: 1

Author

R. H. Hardin Nov 18 2011

Keywords

• nonn

Comments

Column 3 of A200469

Examples

			Some solutions for n=6
..2....0....1....2....0....0....1....0....0....0....0....2....3....2....2....0
..3....0....3....2....0....0....3....3....1....0....2....2....3....3....2....1
..1....2....2....1....3....1....0....3....3....1....2....0....2....3....2....3
..3....2....2....3....3....3....0....2....1....3....0....3....1....2....2....0
..1....1....2....1....2....1....2....0....3....3....0....3....1....2....3....1
..2....3....2....3....3....3....2....1....3....3....2....1....3....2....3....3
		

Links

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