A230691 Number of (n+2)X(2+2) 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least two elements with value (x(i,j)+1) mod 3, and upper left element zero

4, 12, 144, 2494, 39504, 697059, 12059186, 208611750, 3618020875, 62695395092, 1086528474379, 18830939076263, 326354520726216, 5656006078698080, 98023572388848494, 1698833301309485989, 29442258607528840471

Offset

1,1

Comments

Column 2 of A230694

Links

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

R. H. Hardin, Empirical recurrence of order 94

Formula

Empirical recurrence of order 94 (see link above)

Example

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

Crossrefs

Sequence in context: A152121 A077611 A052598 * A032071 A365310 A222393

Adjacent sequences: A230688 A230689 A230690 * A230692 A230693 A230694

Keyword

nonn

Author

R. H. Hardin, Oct 27 2013

Status

approved