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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 July 17 20:28 EDT 2024. Contains 374377 sequences. (Running on oeis4.)