

A197427


Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4


1



5, 71, 448, 5197, 43909, 410456, 4017895, 37566429, 351740354, 3301443327, 31135760775, 294213106126, 2771339919971, 26068700897789, 245447885397640, 2313251869240159, 21800440099050007, 205343629421991480
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OFFSET

1,1


COMMENTS

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


LINKS



EXAMPLE

Some solutions containing all values 0 to 4 for n=5
..2..1..1..0....0..0..1..2....1..3..1..0....2..1..0..1....2..1..0..1
..1..0..1..1....2..1..4..1....0..1..4..1....1..4..1..2....1..4..1..1
..2..1..4..1....1..3..1..0....0..1..1..2....0..1..1..0....0..1..3..0
..0..3..1..0....0..2..1..2....0..2..0..0....1..3..1..0....0..1..1..2
..0..1..2..0....1..1..0..1....0..1..2..1....1..0..2..1....1..1..0..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



