A230684 Number of nX5 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero

0, 0, 0, 360, 15624, 575280, 19355400, 624983184, 19756767240, 617202347472, 19153654203240, 592124427966096, 18264762693276552, 562673517711950736, 17321016136718789352, 532966801486271706576, 16395167381657872458888

Offset

1,4

Comments

Column 5 of A230686

Links

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

Formula

Empirical: a(n) = 48*a(n-1) -482*a(n-2) -2148*a(n-3) +21795*a(n-4) -62688*a(n-5) +379488*a(n-6) +4040700*a(n-7) -31968072*a(n-8) +33656400*a(n-9) +2127888*a(n-10) -7063200*a(n-11) for n>12

Example

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

Crossrefs

Sequence in context: A192829 A229681 A054648 * A299955 A166785 A265455

Adjacent sequences: A230681 A230682 A230683 * A230685 A230686 A230687

Keyword

nonn

Author

R. H. Hardin, Oct 27 2013

Status

approved