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A230909 Number of nX7 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
0, 882, 11324, 130178, 1603356, 20713786, 271505344, 3573938648, 47146678686, 622659105328, 8227931798990, 108754213190144, 1437675672142318, 19006711444189020, 251286474365447448, 3322305731095306986 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A230910

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..0..1..2..0..1..3..2....0..3..0..3..1..0..1....0..3..0..2..3..0..2

..3..0..3..2..0..1..0....1..2..1..0..2..3..2....1..2..1..0..1..3..0

..2..1..0..3..2..3..2....3..0..3..1..0..1..0....3..0..3..2..0..1..2

..0..3..2..0..1..0..1....2..1..0..3..2..3..2....2..1..0..1..3..0..3

CROSSREFS

Sequence in context: A092675 A135127 A338538 * A035758 A107554 A089519

Adjacent sequences:  A230906 A230907 A230908 * A230910 A230911 A230912

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 01 2013

STATUS

approved

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Last modified November 29 04:15 EST 2021. Contains 349416 sequences. (Running on oeis4.)