A200465 Number of 0..4 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 5

5, 15, 45, 135, 405, 1213, 3627, 10846, 32429, 96970, 289870, 866499, 2590128, 7742621, 23144448, 69183744, 206804024, 618180094, 1847865864, 5523643627, 16511274210, 49355507149, 147533484214, 441007079909, 1318258258809

Offset

1,1

Comments

Column 4 of A200469

Links

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

Example

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

Crossrefs

Sequence in context: A000334 A000335 A271180 * A084244 A005030 A200664

Adjacent sequences: A200462 A200463 A200464 * A200466 A200467 A200468

Keyword

nonn

Author

R. H. Hardin Nov 18 2011

Status

approved