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

1,1

Comments

Column 3 of A200469

Links

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

Example

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

Crossrefs

Sequence in context: A126358 A200051 A200663 * A099234 A087222 A130583

Adjacent sequences: A200461 A200462 A200463 * A200465 A200466 A200467

Keyword

nonn

Author

R. H. Hardin Nov 18 2011

Status

approved