A250986 - OEIS

A250986

Number of (n+1)X(n+1) 0..2 arrays with nondecreasing min(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

40, 872, 21955, 590305, 16381510, 469255626, 13747683580, 414063800414, 12788596731195

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OFFSET

1,1

COMMENTS

Diagonal of A250994

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..0..1..0..1....0..1..0..2....0..1..0..1....2..1..0..0....0..0..2..1

..0..0..1..0....0..0..2..0....0..1..0..1....2..1..0..1....0..0..2..1

..0..1..0..1....0..1..0..2....0..1..1..0....2..2..1..2....0..1..1..2

..0..1..1..2....0..0..1..1....0..1..2..2....2..2..1..2....1..2..2..1

CROSSREFS

Sequence in context: A250584 A004421 A247411 * A190825 A054340 A271030

Adjacent sequences: A250983 A250984 A250985 * A250987 A250988 A250989

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved