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

1,1

Comments

Column 4 of A200668

Links

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

Example

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

Crossrefs

Sequence in context: A200465 A084244 A005030 * A099235 A207096 A035069

Adjacent sequences: A200661 A200662 A200663 * A200665 A200666 A200667

Keyword

nonn

Author

R. H. Hardin Nov 20 2011

Status

approved