A221337 -id:A221337 - cp's OEIS frontend

A221335 Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

0, 20, 0, 790, 0, 34042, 0, 1470618, 0, 63526554, 0, 2744129114, 0, 118536728562, 0, 5120367434418, 0, 221181729631882, 0, 9554266491058090, 0, 412710429318366178, 0, 17827626812331482594, 0, 770090248640353835354, 0

Offset: 1

R. H. Hardin Jan 11 2013

nonn

Column 3 of A221337

R. H. Hardin, Table of n, a(n) for n = 1..30

Empirical: a(n) = 66*a(n-2) -1131*a(n-4) +6726*a(n-6) -18808*a(n-8) +27860*a(n-10) -19388*a(n-12) +3240*a(n-14)

A221336 Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

Original entry on oeis.org

4, 68, 790, 10704, 142792, 1937900, 26264018, 356533300, 4838763426, 65677043240, 891388869206

Offset: 1

R. H. Hardin Jan 11 2013

nonn

Column 4 of A221337

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

cp's OEIS Frontend

A221335 Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

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A221336 Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

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