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A198905 Number of nX7 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor 2
187, 804833, 3794115705, 17895005957823, 84402688527136201, 398089706066811447174, 1877611081501313948217870, 8855851690895754550489882369, 41769091588504560613470987916898 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A198906

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions with values 0 to 4 for n=4

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

..1..0..1..0..1..3..2....1..0..1..0..3..0..2....1..0..1..0..3..4..3

..0..1..0..2..0..2..3....0..1..0..2..4..2..4....0..1..0..2..0..1..0

..1..0..2..0..2..4..1....1..0..2..0..2..1..3....1..0..2..0..2..0..2

CROSSREFS

Sequence in context: A208199 A208406 A208413 * A198252 A070257 A204750

Adjacent sequences:  A198902 A198903 A198904 * A198906 A198907 A198908

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 31 2011

STATUS

approved

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)