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A250735 Number of (6+1)X(n+1) 0..1 arrays with nondecreasing 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
166, 350, 942, 2434, 6016, 14437, 34069, 79704, 185684, 431691, 1002869, 2329047, 5409245, 12563824, 29186388, 67808124, 157558290, 366127187, 850864580, 1977462106, 4595987342, 10682199696, 24828823703, 57710916319, 134142923156 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A250729

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 6*a(n-1) -8*a(n-2) -19*a(n-3) +61*a(n-4) -32*a(n-5) -70*a(n-6) +104*a(n-7) -30*a(n-8) -30*a(n-9) +24*a(n-10) -5*a(n-11) for n>15

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A038007 A020361 A256643 * A105987 A051963 A033675

Adjacent sequences:  A250732 A250733 A250734 * A250736 A250737 A250738

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 27 2014

STATUS

approved

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Last modified October 22 07:53 EDT 2021. Contains 348160 sequences. (Running on oeis4.)