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A235257 Number of (n+1)X(7+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant stress tilted 1X1 tilings) 0
600928, 1330480, 2873128, 7200188, 17480904, 47995084, 126993640, 373324260, 1053946488, 3264942732, 9696780840, 31291585876 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A235258

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=1

..4..3..6..1..5..3..4..3....4..0..6..2..6..2..4..0....6..0..3..1..7..2..5..2

..0..6..2..4..1..6..0..6....2..5..4..7..4..7..2..5....4..5..1..6..5..7..3..7

CROSSREFS

Sequence in context: A106780 A304000 A206412 * A185928 A270262 A238310

Adjacent sequences:  A235254 A235255 A235256 * A235258 A235259 A235260

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified July 28 10:29 EDT 2021. Contains 346326 sequences. (Running on oeis4.)