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A250763 Number of (n+1)X(n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction 0
9, 34, 114, 350, 996, 2666, 6810, 16798, 40368, 95114, 220710, 505982, 1148556, 2585674, 5779890, 12840638, 28371816, 62384042 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250769

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A268803 A250652 A005344 * A264678 A050478 A204426

Adjacent sequences:  A250760 A250761 A250762 * A250764 A250765 A250766

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 27 2014

STATUS

approved

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Last modified March 31 16:44 EDT 2020. Contains 333151 sequences. (Running on oeis4.)