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A234815 Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant stress 1X1 tilings) 0
168, 2220, 15224, 129384, 747192, 5441232, 29871848, 201644928, 1092396888, 7078853280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A234823

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

..4..4..5..4..6....3..5..3..4..3....4..6..2..6..6....4..2..5..3..4

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

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

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

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

CROSSREFS

Sequence in context: A235926 A279725 A234730 * A232274 A110075 A331908

Adjacent sequences:  A234812 A234813 A234814 * A234816 A234817 A234818

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2013

STATUS

approved

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Last modified May 22 00:02 EDT 2022. Contains 353931 sequences. (Running on oeis4.)