A233063 Number of (2+1) X (n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i*x(i,j), i=1..2+1} nondecreasing.

16, 47, 130, 319, 755, 1680, 3673, 7751, 16254, 33352, 68448, 138469, 281122, 564810, 1140621, 2284335, 4601127, 9201288, 18508319, 36987885, 74343834, 148524185, 298379462, 596003105, 1196923732, 2390589937, 4799574872, 9585538381

Offset

1,1

Comments

Row 2 of A233062.

Links

R. H. Hardin, Table of n, a(n) for n = 1..161

Example

Some solutions for n=5
..0..0..1..0..0..1....0..0..1..1..0..1....0..0..1..0..0..0....0..0..1..0..1..1
..0..0..0..1..1..1....0..0..1..0..1..1....0..0..1..0..0..1....0..0..1..0..1..1
..1..1..1..1..1..1....0..1..0..1..1..1....0..1..0..1..1..1....1..1..0..1..0..1

Crossrefs

Cf. A233062.

Sequence in context: A194268 A292171 A204609 * A208634 A333602 A083307

Adjacent sequences: A233060 A233061 A233062 * A233064 A233065 A233066

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved