A233216 Number of nX7 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

2136, 63927526, 2085188355031, 68131170547319605, 2226181797646725541747, 72740398470430937674004869, 2376789549887845473135654118063, 77661501511303736156705770125000481

Offset

1,1

Comments

Column 7 of A233217

Links

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

Formula

Empirical: a(n) = 33813*a(n-1) -37586312*a(n-2) +13154245126*a(n-3) -1823279915649*a(n-4) +121941114617057*a(n-5) -4330072079111646*a(n-6) +84481700679625284*a(n-7) -904847795173155960*a(n-8) +5048892735655335840*a(n-9) -12592032279830140032*a(n-10) +8367715579796052480*a(n-11)

Example

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

Crossrefs

Sequence in context: A233146 A233238 A233112 * A319008 A020398 A115435

Adjacent sequences: A233213 A233214 A233215 * A233217 A233218 A233219

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved