A222461 Number of nX5 0..7 arrays with no entry increasing mod 8 by 7 rightwards or downwards, starting with upper left zero

2401, 23931607, 238535974201, 2377584520856755, 23698346512668445387, 236211004301185098853381, 2354410613553773007691517269, 23467362808156794232691794722151, 233908696299327013910964536639599807

Offset

1,1

Comments

Column 5 of A222462

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Formula

Empirical: a(n) = 10754*a(n-1) -8060499*a(n-2) +2219242223*a(n-3) -245682627864*a(n-4) +5798947687589*a(n-5) +448113231493438*a(n-6) -2763020698450992*a(n-7)

Example

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

Crossrefs

Sequence in context: A061210 A226092 A097015 * A013845 A352730 A031776

Adjacent sequences: A222458 A222459 A222460 * A222462 A222463 A222464

Keyword

nonn

Author

R. H. Hardin Feb 21 2013

Status

approved