A232944 Number of nX4 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

27, 577, 13707, 328989, 7915555, 190528543, 4586348177, 110402289283, 2657600587981, 63973693477099, 1539973156889093, 37070195640900395, 892352830608056783, 21480695221316837187, 517082762971533490471

Offset

1,1

Comments

Column 4 of A232948

Links

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

Formula

Empirical: a(n) = 29*a(n-1) -126*a(n-2) +186*a(n-3) -207*a(n-4) +40*a(n-5) +83*a(n-6) -29*a(n-7) -14*a(n-8) +8*a(n-9) -a(n-10) for n>11

Example

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

Crossrefs

Sequence in context: A267544 A061914 A076008 * A185891 A185883 A212670

Adjacent sequences: A232941 A232942 A232943 * A232945 A232946 A232947

Keyword

nonn

Author

R. H. Hardin, Dec 02 2013

Status

approved