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A234482 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant stress 1X1 tilings) 0
62, 926, 13260, 183422, 2455350, 31925284, 404043442, 4993740182, 60359720132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A234490

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A196413 A131473 A138408 * A157499 A249235 A250564

Adjacent sequences:  A234479 A234480 A234481 * A234483 A234484 A234485

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 26 2013

STATUS

approved

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Last modified September 17 10:52 EDT 2019. Contains 327129 sequences. (Running on oeis4.)