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 A223563 Number of n X n 0..1 arrays with antidiagonals unimodal 1
 2, 16, 448, 34496, 6071296, 2137096192, 1363467370496, 1463000488542208, 2490026831498838016, 6414309117941006729216, 24066487810514657248018432, 127383919981054080813761560576, 925826330422301059354419022266368 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A223569 LINKS R. H. Hardin, Table of n, a(n) for n = 1..99 FORMULA a(n) = product{ (1+(i*(i+1)/2))^2 , i=1..(n-1) } * (1+(n*(n+1)/2)) EXAMPLE Some solutions for n=4 ..0..1..0..0....0..0..0..0....1..1..0..1....0..1..1..0....1..0..0..1 ..0..0..0..1....0..1..0..1....1..0..1..0....1..0..0..1....1..1..1..0 ..1..1..0..0....0..1..1..0....0..0..0..0....0..1..0..0....0..1..0..0 ..0..0..0..1....0..1..1..0....0..0..1..0....1..0..0..1....1..1..0..0 CROSSREFS Sequence in context: A012678 A012146 A113109 * A140309 A201383 A354279 Adjacent sequences: A223560 A223561 A223562 * A223564 A223565 A223566 KEYWORD nonn AUTHOR R. H. Hardin Mar 22 2013 STATUS approved

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Last modified August 14 09:16 EDT 2024. Contains 375159 sequences. (Running on oeis4.)