A222338 Number of nX5 0..6 arrays with no entry increasing mod 7 by 6 rightwards or downwards, starting with upper left zero

1296, 5541126, 23691810366, 101297497221786, 433110977725751106, 1851823828949372226486, 7917720099292335726179166, 33853269728349231756633211146, 144744175965862513604773406152386

Offset

1,1

Comments

Column 5 of A222340

Links

R. H. Hardin, Table of n, a(n) for n = 1..73

Formula

Empirical: a(n) = 4726*a(n-1) -1996686*a(n-2) +308276506*a(n-3) -18629904781*a(n-4) +185850985068*a(n-5) +13276501451568*a(n-6) -66007323700200*a(n-7)

Example

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

Crossrefs

Sequence in context: A223360 A204083 A067492 * A013841 A358648 A256834

Adjacent sequences: A222335 A222336 A222337 * A222339 A222340 A222341

Keyword

nonn

Author

R. H. Hardin Feb 15 2013

Status

approved