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 A203543 Number of n X n 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor 0
 1, 25, 32920, 276550270, 33466433693229, 72614149907378126398, 2637221656906543119366072476, 1479737300994461631995281660020138894 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A203550 LINKS EXAMPLE Some solutions for n=5 ..3..0..1..3..2....1..4..2..2..3....1..0..4..0..3....0..1..3..4..4 ..3..2..1..3..4....0..4..3..1..4....1..0..4..0..3....2..0..1..1..4 ..3..1..4..2..4....1..4..3..3..4....3..2..4..3..3....2..2..3..4..0 ..3..4..4..4..4....3..4..2..4..4....4..3..4..2..3....1..2..3..4..2 ..4..4..4..3..4....3..4..4..3..4....4..4..4..4..0....4..4..4..4..4 CROSSREFS Sequence in context: A082211 A053766 A298467 * A034711 A325215 A076445 Adjacent sequences:  A203540 A203541 A203542 * A203544 A203545 A203546 KEYWORD nonn AUTHOR R. H. Hardin Jan 02 2012 STATUS approved

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Last modified January 17 12:48 EST 2020. Contains 330958 sequences. (Running on oeis4.)