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 A203270 Number of n X n 0..5 arrays with every nonzero element less than or equal to some NW, E or S neighbor 0
 1, 36, 107968, 2590250609, 1126396980640358, 11855913847814563858262, 2882997102757569110567142289632 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A203277 LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for n=4 ..4..3..5..5....3..5..0..3....3..5..3..1....4..2..5..2....1..2..3..4 ..4..2..5..5....0..5..5..3....5..5..4..1....4..2..5..2....1..2..1..4 ..4..1..1..3....4..5..5..3....0..5..1..1....4..5..5..4....0..2..4..4 ..4..4..0..0....3..4..1..5....5..5..5..0....1..5..5..4....0..0..3..4 CROSSREFS Sequence in context: A357804 A097573 A133015 * A185960 A334409 A216832 Adjacent sequences: A203267 A203268 A203269 * A203271 A203272 A203273 KEYWORD nonn AUTHOR R. H. Hardin Dec 31 2011 STATUS approved

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Last modified July 18 09:18 EDT 2024. Contains 374378 sequences. (Running on oeis4.)