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A195961 Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself 1
1, 21, 82, 105, 92, 410, 945, 1919, 4478, 10274, 27467, 73240, 184074, 475431, 1290711, 3500703, 9203789, 24842074, 67959738, 185261546, 500164424, 1364785665, 3747581211, 10238569012, 27972042011, 76776169280, 210809165289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A195962

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..173

EXAMPLE

Some solutions for n=5

..2..1..1..1..1..1..1....1..2..2..3..2..2..1....1..3..2..2..3..2..1

..1..1..4..3..3..4..3....1..3..3..4..3..3..1....1..4..3..3..4..2..1

..1..1..1..1..1..1..1....1..1..1..1..1..1..1....1..2..2..2..2..2..1

..3..4..1..1..1..1..1....3..1..1..1..1..1..3....1..2..4..3..3..4..1

..1..1..1..2..2..3..2....1..1..3..2..2..1..1....1..2..3..2..2..3..1

CROSSREFS

Sequence in context: A158493 A159743 A219593 * A190023 A071397 A064762

Adjacent sequences:  A195958 A195959 A195960 * A195962 A195963 A195964

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 25 2011

STATUS

approved

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Last modified March 21 07:23 EDT 2019. Contains 321367 sequences. (Running on oeis4.)