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A250580
Number of (n+1)X(5+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
1
282, 758, 1779, 4013, 8914, 19806, 44104, 98902, 222987, 506145, 1154234, 2644847, 6079586, 14016928, 32378102, 74921678, 173549426, 402401946, 933565065, 2166994001, 5031542164, 11686029668, 27145660442, 63066542163, 146531950506
OFFSET
1,1
Column 5 of A250583
FORMULA
Empirical: a(n) = 7*a(n-1) -15*a(n-2) -4*a(n-3) +64*a(n-4) -90*a(n-5) +9*a(n-6) +94*a(n-7) -96*a(n-8) +31*a(n-9) +6*a(n-10) -6*a(n-11) +a(n-12) for n>14
EXAMPLE
Some solutions for n=6
..0..0..0..0..0..0....0..0..1..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..1..1....0..1..0..1..1..1....0..0..0..0..0..0....0..0..0..0..0..1
..0..0..0..0..1..1....1..0..1..1..1..1....0..0..0..0..0..1....0..0..0..0..0..1
..0..0..0..0..1..1....0..1..1..1..1..1....0..0..0..0..0..1....0..0..0..0..0..1
..1..0..1..1..1..1....1..1..1..1..1..1....0..0..1..1..1..1....0..0..0..1..1..1
..0..1..1..1..1..1....1..1..1..1..1..1....0..1..1..1..1..1....0..0..0..1..1..1
..1..0..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1....0..0..1..1..1..1
CROSSREFS
Sequence in context: A320706 A356854 A114804 * A252364 A345704 A224115
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2014
STATUS
approved

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Last modified September 19 23:07 EDT 2024. Contains 376015 sequences. (Running on oeis4.)