A275134 Number of 5Xn 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,0) or (-1,1) and new values introduced in order 0..2.

8, 108, 373, 2178, 12423, 71576, 412306, 2381629, 13727957, 79158451, 456572944, 2633093481, 15185124732, 87573269532, 505049273961, 2912660248825, 16797581275481, 96873339396362, 558678129749247, 3221951115220504

Offset: 1

Author

R. H. Hardin, Jul 17 2016

Keywords

• nonn

Comments

Row 5 of A275131.

Examples

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

Links

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

Crossrefs

Cf. A275131.

Formula

Empirical: a(n) = a(n-1) +16*a(n-2) +49*a(n-3) +109*a(n-4) +31*a(n-5) -508*a(n-6) +75*a(n-7) +324*a(n-8) -972*a(n-9) +260*a(n-10) for n>14