A232954 Number of nX7 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero

729, 166629, 42904365, 11228712351, 2953363127697, 777971521023633, 205030957086979647, 54043267342289534097, 14245737532796759368533, 3755217033315506600279775, 989890841378547325619047929

Offset

1,1

Comments

Column 7 of A232955

Links

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

Example

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

Crossrefs

Sequence in context: A232947 A016842 A231861 * A222168 A016890 A223555

Adjacent sequences: A232951 A232952 A232953 * A232955 A232956 A232957

Keyword

nonn

Author

R. H. Hardin, Dec 02 2013

Status

approved