A233079 Number of n X 5 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.

41, 4631, 529862, 60632429, 6938214854, 793945203881, 90851753687090, 10396235291448605, 1189649113515482414, 136132453105625552657, 15577740173984637831242, 1782572659143148713774245

Offset: 1

Author

R. H. Hardin, Dec 03 2013

Keywords

• nonn

Examples

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

Links

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

Crossrefs

Column 5 of A233082.

Formula

Empirical: a(n) = 118*a(n-1) - 411*a(n-2) + 294*a(n-3).

Empirical g.f.: x*(41 - 207*x + 255*x^2) / ((1 - x)*(1 - 117*x + 294*x^2)). - Colin Barker, Oct 07 2018