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 A223566 Number of nX5 0..1 arrays with antidiagonals unimodal 1
 32, 1024, 21952, 379456, 6071296, 97140736, 1554251776, 24868028416, 397888454656, 6366215274496, 101859444391936, 1629751110270976, 26076017764335616, 417216284229369856, 6675460547669917696 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A223569 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA a(n) = product{ (1+(i*(i+1)/2))^2 , i=1..(min(n,5)-1) } * (1+(min(n,5)*(min(n,5)+1)/2))^(max(n,5)-min(n,5)+1) a(n) = 16*a(n-1) for n>4 EXAMPLE Some solutions for n=4 ..0..1..0..0..1....0..1..1..0..1....0..0..0..0..0....0..1..1..0..0 ..0..1..0..0..1....0..1..0..1..0....0..1..0..1..1....0..1..1..1..0 ..0..1..0..1..1....0..0..0..0..0....1..0..1..0..0....1..1..1..1..0 ..0..0..1..0..1....0..0..0..1..1....1..1..0..0..1....0..1..1..0..1 CROSSREFS Sequence in context: A181216 A297378 A283861 * A227593 A171306 A009976 Adjacent sequences: A223563 A223564 A223565 * A223567 A223568 A223569 KEYWORD nonn AUTHOR R. H. Hardin Mar 22 2013 STATUS approved

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Last modified September 11 08:57 EDT 2024. Contains 375814 sequences. (Running on oeis4.)