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A196642
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Number of nXn 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,3,4,0,2 for x=0,1,2,3,4
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0
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1, 1, 16, 129, 4273, 217880, 23946130, 5094296927, 2171426372387, 1837082082523359, 3094534584891471987, 10360619358796873163844, 68989834793646571143250669, 913590557002024874434691467840
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OFFSET
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1,3
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COMMENTS
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Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 4's, every 3 is next to 3 0's, every 4 is next to 4 2's
Diagonal of A196646
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LINKS
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Table of n, a(n) for n=1..14.
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EXAMPLE
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Some solutions for n=4
..0..0..0..0....0..0..3..0....0..0..0..0....0..0..0..0....0..0..3..0
..0..3..0..3....0..0..0..0....3..0..3..0....0..0..0..0....3..0..0..0
..0..3..0..0....3..0..0..3....0..0..3..0....0..3..3..0....0..3..3..0
..0..0..3..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
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CROSSREFS
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Sequence in context: A031156 A099195 A041486 * A196595 A055914 A183535
Adjacent sequences: A196639 A196640 A196641 * A196643 A196644 A196645
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Oct 04 2011
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STATUS
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approved
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