A233297 Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

7, 15, 31, 64, 129, 258, 515, 1029, 2055, 4107, 8211, 16410, 32811, 65624, 131224, 262372, 524634, 1049237, 2098363, 4196161, 8391728, 16783688, 33567165, 67128918, 134250383, 268502449, 536999938, 1073948247, 2147837919, 4295732271

Offset

1,1

Comments

Column 1 of A233301

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

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

Crossrefs

Sequence in context: A137196 A120094 A078485 * A159695 A014001 A291642

Adjacent sequences: A233294 A233295 A233296 * A233298 A233299 A233300

Keyword

nonn

Author

R. H. Hardin, Dec 07 2013

Status

approved