A233086 Number of 5Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.

136, 9842, 875165, 77824814, 6938214854, 618844579511, 55204524946337, 4924730456325950, 439332915121147814, 39192753113196729071, 3496374576586734284957, 311910622275336283545350

Offset: 1

Author

R. H. Hardin, Dec 03 2013

Keywords

• nonn

Comments

Row 5 of A233082

Examples

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

Links

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

Formula

Empirical: a(n) = 132*a(n-1) -4507*a(n-2) +66832*a(n-3) -492772*a(n-4) +1765654*a(n-5) -2023881*a(n-6) -4686284*a(n-7) [phone]*a(n-8) -16068834*a(n-9) +5437152*a(n-10) for n>14