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 A203020 Number of nX2 nonnegative integer arrays with adjacent horizontal and vertical element pair sums equal to all values in 0..2nk-n-k-1 (each exactly once) 0
 1, 8, 36, 544, 12700, 431432, 17482140, 1012606444 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A203022 LINKS Table of n, a(n) for n=1..8. EXAMPLE Some solutions for n=4 ..2..1....2..4....4..1....5..0....5..1....1..7....5..2....3..3....2..7....0..2 ..0..0....2..3....2..0....4..0....0..0....3..2....4..1....4..5....0..0....0..6 ..5..4....0..0....7..0....2..1....7..2....0..0....0..0....0..0....1..4....4..3 ..3..3....8..1....1..3....0..7....1..2....6..1....2..6....2..1....2..4....1..0 CROSSREFS Sequence in context: A058823 A244301 A268157 * A276175 A050536 A261846 Adjacent sequences: A203017 A203018 A203019 * A203021 A203022 A203023 KEYWORD nonn AUTHOR R. H. Hardin Dec 27 2011 STATUS approved

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Last modified September 12 12:03 EDT 2024. Contains 375851 sequences. (Running on oeis4.)