

A232152


Number of 4Xn 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, diagonally or antidiagonally


1



1, 887, 67311, 3409361, 191897041, 11346946019, 663248443295, 38578051319991, 2246283227163449, 130862879072024301, 7622964864814416035, 444025298198899334745, 25864000876540165953917, 1506559074693480517741153
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OFFSET

1,2


COMMENTS



LINKS



FORMULA

Empirical recurrence of order 58 (see link above)


EXAMPLE

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



