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A235090 Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant stress tilted 1X1 tilings) 0
80, 656, 3832, 21264, 102336, 524728, 2420288, 12147808, 55604120, 276524288, 1267295968, 6262860184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A235098

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A068782 A255478 A204342 * A211693 A164753 A279745

Adjacent sequences:  A235087 A235088 A235089 * A235091 A235092 A235093

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 03 2014

STATUS

approved

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Last modified October 14 16:40 EDT 2019. Contains 328022 sequences. (Running on oeis4.)