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 A252671 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7 0
 656, 630, 2106, 7747, 96174, 1404868, 10457376, 432468082, 18264393655, 223008908330, 30759205997253, 3752044589478219, 71270194170511699, 33527998766173019766, 11865743162374482670070, 340835456009112200117336 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A252679 LINKS EXAMPLE Some solutions for n=4 ..2..0..0..2..0..0....2..0..0..2..0..3....1..0..1..1..0..1....0..0..2..0..3..2 ..2..1..2..2..3..1....1..0..1..1..0..1....1..1..3..1..1..3....0..1..1..0..1..1 ..0..0..2..0..0..2....1..1..0..1..1..0....2..0..0..2..0..0....1..3..1..1..0..1 ..2..0..0..2..0..0....2..0..0..2..0..3....1..0..1..1..0..1....0..0..2..0..3..2 ..1..3..2..2..1..2....1..0..1..1..0..1....1..1..0..1..1..0....3..1..1..0..1..1 ..0..0..2..0..0..2....1..1..0..1..1..0....2..3..0..2..0..3....1..0..1..1..0..1 CROSSREFS Sequence in context: A280445 A220057 A194653 * A252672 A252679 A252680 Adjacent sequences:  A252668 A252669 A252670 * A252672 A252673 A252674 KEYWORD nonn AUTHOR R. H. Hardin, Dec 20 2014 STATUS approved

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Last modified June 13 20:25 EDT 2021. Contains 345009 sequences. (Running on oeis4.)