A232947 Number of nX7 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically or antidiagonally, and top left element zero

729, 114243, 22471303, 4586348177, 950054488141, 197901829874065, 41313911641960579, 8631911498064803251, 1804078633382571536609, 377098877333784048574025, 78826795850335605854348539

Offset

1,1

Comments

Column 7 of A232948

Links

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

Example

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

Crossrefs

Sequence in context: A224378 A223479 A223503 * A016842 A231861 A232954

Adjacent sequences: A232944 A232945 A232946 * A232948 A232949 A232950

Keyword

nonn

Author

R. H. Hardin, Dec 02 2013

Status

approved