

A196286


Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,3,1,4 for x=0,1,2,3,4


1



17, 123, 728, 13533, 138924, 1306488, 13307143, 182868341, 2172296568, 23151489546, 259759374474, 2973891043730, 33893925587254, 389550320415853, 4527825351283814, 51569682047646201, 583253931896374775
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OFFSET

1,1


COMMENTS

Every 0 is next to 0 2's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 1's, every 4 is next to 4 4's


LINKS



EXAMPLE

Some solutions for n=4
..1..3..1..0..1..1..0....0..0..1..1..3..1..0....1..3..1..0..0..0..0
..0..1..1..0..1..3..1....1..1..1..0..1..1..0....0..1..3..1..1..1..1
..1..3..1..3..1..0..1....1..1..1..0..3..1..1....1..1..2..3..1..1..3
..1..0..0..1..1..0..1....0..0..1..1..1..0..1....1..0..1..1..0..0..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



