A276302 Number of 5Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-1) and new values introduced in order 0..2.

41, 88, 805, 5965, 50949, 408105, 3363533, 27372713, 224012077, 1828722821, 14945190941, 122079734781, 997423034925, 8148425295997, 66571199181721, 543864761405757, 4443232843935221, 36299916368689017, 296560213286564513

Offset: 1

Author

R. H. Hardin, Aug 28 2016

Keywords

• nonn

Comments

Row 5 of A276299.

Examples

			Some solutions for n=4
..0..1..2..1. .0..1..0..1. .0..1..0..1. .0..1..2..1. .0..1..0..1
..2..1..2..1. .0..2..0..2. .0..1..0..1. .2..0..2..0. .0..1..0..1
..2..1..0..1. .0..1..0..2. .2..1..2..1. .2..1..2..0. .0..1..2..1
..2..1..2..0. .2..1..0..1. .2..1..2..1. .2..0..2..0. .2..1..0..2
..2..1..2..1. .2..1..0..2. .2..0..2..0. .2..1..2..1. .0..2..0..1
		

Links

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

Crossrefs

Cf. A276299.

Formula

Empirical: a(n) = 3*a(n-1) +33*a(n-2) +66*a(n-3) +94*a(n-4) -115*a(n-5) -155*a(n-6) -255*a(n-7) +236*a(n-8) +152*a(n-9) +61*a(n-10) -213*a(n-11) +90*a(n-12) -5*a(n-13) +13*a(n-14) -4*a(n-15) for n>17