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A234920 Number of (n+1)X(7+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
39720, 169128, 710304, 4151672, 22970144, 150606424, 911837036, 6251426440, 39266933948, 276635826688, 1778814863004, 12796967663216, 83932949350360, 614139960280996, 4103610483499364, 30438970840376560, 207060580976230816 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A234921

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..100

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A236132 A204311 A235255 * A116220 A103809 A257192

Adjacent sequences:  A234917 A234918 A234919 * A234921 A234922 A234923

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

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Last modified June 16 09:27 EDT 2021. Contains 345056 sequences. (Running on oeis4.)