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Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors

0

`%I #4 Mar 31 2012 12:36:34
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`%S 855,47436498,3201911378187,217885196778717007,
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`%T 14827770532074166305565,1009078065869144136137180812
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`%N Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors
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`%C Column 7 of A198528
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`%e Some solutions for n=4
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`%e ..0..0..0..1..0..0..2....0..0..0..1..0..2..3....0..0..0..1..0..2..2
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`%e ..1..1..0..0..2..1..3....1..1..0..0..2..4..1....1..1..0..0..2..3..0
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`%e ..0..0..1..0..2..3..0....0..0..1..0..2..2..1....0..0..1..0..2..1..1
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`%e ..0..0..1..0..0..3..4....0..0..1..0..0..0..4....0..0..1..0..0..0..3
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`%K nonn
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`%O 1,1
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`%A _R. H. Hardin_ Oct 26 2011
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