A200664 Number of 0..4 arrays x(0..n-1) of n elements with each no smaller than the sum of its three previous neighbors modulo 5.

5, 15, 45, 135, 406, 1217, 3650, 10959, 32941, 99044, 297812, 895494, 2692703, 8096855, 24346869, 73209872, 220138513, 661945308, 1990435887, 5985139586, 17997009753, 54116091662, 162724331983, 489303778636, 1471311543936

Offset: 1

Author

R. H. Hardin Nov 20 2011

Keywords

• nonn

Comments

Column 4 of A200668

Examples

			Some solutions for n=6
..1....0....2....1....2....3....0....1....2....3....1....0....0....0....1....0
..4....1....3....3....3....4....0....2....3....4....4....4....0....1....2....1
..1....3....3....4....1....4....0....3....1....3....4....4....0....4....4....2
..3....4....4....3....2....2....0....2....2....3....4....4....3....2....2....3
..4....4....0....3....1....0....1....4....2....1....2....4....4....4....4....2
..4....1....2....2....4....4....2....4....0....2....2....3....3....4....3....2
		

Links

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