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A223568 Number of nX7 0..1 arrays with antidiagonals unimodal 2
128, 16384, 1075648, 45914176, 1554251776, 47016116224, 1363467370496, 39540553744384, 1146676058587136, 33253605699026944, 964354565271781376, 27966282392881659904, 811022189393568137216, 23519643492413475979264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 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,7)-1) } * (1+(min(n,7)*(min(n,7)+1)/2))^(max(n,7)-min(n,7)+1)

a(n) = 29*a(n-1) for n>6

EXAMPLE

Some solutions for n=4

..0..0..0..1..0..1..1....0..0..0..1..0..0..0....0..0..0..0..0..0..0

..0..0..0..0..1..0..1....0..0..0..1..0..0..1....0..0..0..0..0..1..1

..0..0..0..0..0..1..1....0..0..1..0..1..1..1....0..0..1..1..0..1..0

..0..0..0..0..1..0..1....0..0..0..1..1..1..0....0..0..0..0..0..0..0

CROSSREFS

Sequence in context: A189109 A297380 A283863 * A144321 A051251 A264346

Adjacent sequences:  A223565 A223566 A223567 * A223569 A223570 A223571

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 22 2013

STATUS

approved

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Last modified July 17 18:46 EDT 2019. Contains 325109 sequences. (Running on oeis4.)