A222141 Number of nX5 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero

256, 114244, 50999956, 22767656980, 10164078082036, 4537511642094436, 2025664524518719732, 904309916809657591444, 403707729455406641892052, 180225747607432250658675940, 80457513519867024627155058004

Offset

1,1

Comments

Column 5 of A222144

Links

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

Formula

Empirical: a(n) = 542*a(n-1) -45648*a(n-2) +1362782*a(n-3) -14182035*a(n-4) -10420216*a(n-5) +672452128*a(n-6) -1495546560*a(n-7)

Example

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

Crossrefs

Sequence in context: A205927 A223354 A236941 * A333585 A185924 A013997

Adjacent sequences: A222138 A222139 A222140 * A222142 A222143 A222144

Keyword

nonn

Author

R. H. Hardin Feb 09 2013

Status

approved