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A235090 Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 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

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

Diagonal of A235098.

Sequence in context: A342188 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 2 06:08 EDT 2022. Contains 357191 sequences. (Running on oeis4.)