

A253478


Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock nesw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically


1



558, 6804, 85280, 1066300, 13347930, 166986430, 2089637292, 26146542588, 327171117860, 4093826224868, 51225496342820, 640976478054436, 8020442466701434, 100358565951977392, 1255771461301697900
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OFFSET

1,1


COMMENTS



LINKS



FORMULA

Empirical recurrence of order 88 (see link above)


EXAMPLE

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



