A269050 Number of n X 6 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

336, 3288, 58752, 971844, 15547380, 242861616, 3726221592, 56376679620, 843461153880, 12504078167988, 183960496250712, 2689028139554232, 39089999874219540, 565531265339620620, 8147584788387401052

Offset

1,1

Comments

Column 6 of A269052.

Links

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

Formula

Empirical: a(n) = 36*a(n-1) -436*a(n-2) +1854*a(n-3) +340*a(n-4) -19128*a(n-5) +23849*a(n-6) +56184*a(n-7) -108224*a(n-8) -40816*a(n-9) +160400*a(n-10) -34136*a(n-11) -83203*a(n-12) +42628*a(n-13) +6468*a(n-14) -6334*a(n-15) +204*a(n-16) +240*a(n-17) -25*a(n-18) for n>19.

Example

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

Crossrefs

Cf. A269052.

Sequence in context: A268807 A159206 A251066 * A184557 A337873 A337875

Adjacent sequences: A269047 A269048 A269049 * A269051 A269052 A269053

Keyword

nonn

Author

R. H. Hardin, Feb 18 2016

Status

approved