A230912 Number of nX5 0..7 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero

0, 2, 164, 5714, 221768, 9144134, 372256436, 15083831290, 611930935216, 24834134356510, 1007737924024732, 40891632273267442, 1659302731260314936, 67331404086209327030, 2732180126250261658692, 110866649653148718923818

Offset

1,2

Comments

Column 5 of A230915

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n) = 50*a(n-1) -580*a(n-2) +9636*a(n-3) -75225*a(n-4) +427310*a(n-5) -1370674*a(n-6) +496852*a(n-7) +569224*a(n-8) +39600*a(n-9) for n>10

Example

Some solutions for n=3
..0..1..2..1..0....0..1..2..1..0....0..1..2..3..2....0..1..2..3..4
..0..3..4..7..6....0..3..6..7..6....0..5..4..3..2....0..7..6..5..2
..4..5..6..5..4....4..5..4..5..4....6..7..0..1..0....6..5..4..3..2

Crossrefs

Sequence in context: A162904 A346720 A259319 * A339009 A139928 A297407

Adjacent sequences: A230909 A230910 A230911 * A230913 A230914 A230915

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved