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A234657 Number of (n+1)X(7+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant stress 1X1 tilings) 0
1434624, 2414992, 4196144, 8731840, 18735792, 46510768, 118121744, 335161744, 966751344, 3047922832, 9726377744, 33467842000, 116063388912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A234658

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=1

..0..3..1..3..1..5..1..4....0..5..1..3..1..2..0..2....3..0..3..0..5..4..0..0

..3..2..4..2..4..4..4..3....3..4..4..2..4..1..3..1....0..1..0..1..2..5..5..1

CROSSREFS

Sequence in context: A242824 A204288 A321040 * A015361 A259306 A210629

Adjacent sequences:  A234654 A234655 A234656 * A234658 A234659 A234660

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

STATUS

approved

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Last modified February 28 09:13 EST 2021. Contains 341695 sequences. (Running on oeis4.)