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A234219 Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). 0
104, 1560, 17448, 167688, 1379816, 11145960, 83324136, 639913896, 4699132904 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

Some solutions for n=4:

  3 1 0 1 1      0 0 0 0 1      1 0 3 4 2      0 1 0 4 0

  0 1 3 1 4      1 4 1 4 2      0 2 2 0 1      3 1 3 4 3

  0 4 3 4 4      3 3 3 3 4      1 0 3 4 2      0 1 0 4 0

  3 4 0 4 1      1 4 1 4 2      1 3 3 1 2      2 0 2 3 2

  3 1 0 1 1      0 0 0 0 1      1 0 3 4 2      2 3 2 0 2

CROSSREFS

Diagonal of A234227.

Sequence in context: A132434 A187589 A200196 * A223420 A250325 A244946

Adjacent sequences:  A234216 A234217 A234218 * A234220 A234221 A234222

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 2013

STATUS

approved

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Last modified October 1 12:45 EDT 2022. Contains 357147 sequences. (Running on oeis4.)