A230067 Number of nX7 0..2 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j)

0, 3969, 266805, 137945025, 43142680647, 15615593045649, 5392746297039195, 1888668174848027049, 658744922326993528365, 230036351941714961424609, 80301571203375381579772923, 28034704123779041409942781569

Offset

1,2

Comments

Column 7 of A230068

Links

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

Example

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

Crossrefs

Sequence in context: A329786 A343024 A343002 * A031561 A031741 A204501

Adjacent sequences: A230064 A230065 A230066 * A230068 A230069 A230070

Keyword

nonn

Author

R. H. Hardin, Oct 08 2013

Status

approved