A275146 Number of 6Xn 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.

122, 7776, 10000, 25344, 41360, 165568, 663904, 2695808, 10930304, 44604864, 182448928, 745425056, 3044211024, 12443779056, 50916573248, 208404032016, 852924441248, 3490340288512, 14283233460800, 58452748415536

Offset: 1

Author

R. H. Hardin, Jul 17 2016

Keywords

• nonn

Comments

Row 6 of A275142.

Examples

			Some solutions for n=5
..0..1..2..0..2. .0..1..0..2..0. .0..1..0..1..2. .0..1..2..0..2
..2..0..1..2..0. .0..2..1..0..2. .0..2..1..2..1. .2..0..2..0..1
..1..2..1..2..0. .1..2..1..0..2. .1..0..1..0..2. .1..0..1..2..1
..0..2..0..1..0. .1..0..2..1..2. .1..0..2..1..0. .1..2..0..1..0
..0..1..2..0..2. .2..0..2..1..0. .1..0..2..1..0. .1..2..0..1..2
..0..2..1..0..1. .0..2..0..2..1. .0..2..0..2..0. .2..1..2..0..1
		

Links

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

Crossrefs

Cf. A275142.

Formula

Empirical: a(n) = 13*a(n-1) -77*a(n-2) +286*a(n-3) -736*a(n-4) +1351*a(n-5) -1787*a(n-6) +1716*a(n-7) -1217*a(n-8) +652*a(n-9) -265*a(n-10) +78*a(n-11) -14*a(n-12) +a(n-13) for n>18