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A234670 Number of (n+1)X(4+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant stress 1X1 tilings) 1
229272, 1648188, 11826092, 85076140, 612823800, 4421960468, 31951474920, 231249678820, 1675919782860, 12165195549188, 88420148767440, 643663869538676, 4691581089095824, 34248260363836644, 250321059877067092 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A234672

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..36

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A287900 A139411 A212727 * A324636 A015319 A270515

Adjacent sequences:  A234667 A234668 A234669 * A234671 A234672 A234673

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

STATUS

approved

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Last modified January 26 05:13 EST 2022. Contains 350572 sequences. (Running on oeis4.)