

A191477


Number of n X n symmetric binary matrices with each 1 adjacent to no more than 1 kingmove neighboring 1


1



2, 5, 15, 92, 716, 8595, 156804, 4204649, 170016558, 10240395108, 922770471915, 124331209274267, 25029189338772296, 7533759271342997075, 3389438730483714015640, 2279436096066483952197622
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OFFSET

1,1


LINKS



EXAMPLE

Some solutions for n=4
..1..0..0..1....0..0..0..0....1..0..1..0....1..0..0..0....1..0..0..0
..0..0..0..0....0..1..0..1....0..0..0..0....0..1..0..1....0..0..1..0
..0..0..0..0....0..0..0..0....1..0..0..0....0..0..0..0....0..1..0..0
..1..0..0..0....0..1..0..0....0..0..0..1....0..1..0..1....0..0..0..0


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



