

A196492


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


2



1, 31, 553, 7761, 123151, 1875863, 28338246, 434666223, 6656162368, 101518856651, 1549818281847, 23688276304457, 361894920969682, 5527193051141256, 84429912619066523, 1289786041484393709, 19702421130556030141
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OFFSET

1,2


COMMENTS

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



