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 A202918 Number of n X n nonnegative integer arrays with each row and column increasing from zero by 0, 1, 2 or 3 0
 1, 4, 90, 11016, 7083180, 23491810780, 398328574277322, 34356415364024198698, 15026792073190842661982128, 33259034071925704355191308972010 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A202924 LINKS EXAMPLE Some solutions for n=4 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 ..0..1..2..3....0..0..2..2....0..0..3..3....0..0..2..2....0..0..0..1 ..0..1..4..6....0..3..4..4....0..1..3..4....0..0..2..4....0..0..0..2 ..0..3..4..7....0..3..4..7....0..1..4..7....0..1..4..6....0..0..2..3 CROSSREFS Sequence in context: A240379 A304190 A274056 * A146506 A202575 A201721 Adjacent sequences:  A202915 A202916 A202917 * A202919 A202920 A202921 KEYWORD nonn AUTHOR R. H. Hardin Dec 26 2011 STATUS approved

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Last modified May 25 22:17 EDT 2019. Contains 323576 sequences. (Running on oeis4.)