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

1,1

Comments

Row 6 of A275142.

Links

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

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

Example

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

Crossrefs

Cf. A275142.

Sequence in context: A192870 A208432 A275356 * A275226 A281609 A233071

Adjacent sequences: A275143 A275144 A275145 * A275147 A275148 A275149

Keyword

nonn

Author

R. H. Hardin, Jul 17 2016

Status

approved