A233064 Number of (3+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..3+1} nondecreasing

33, 161, 723, 2875, 10650, 36674, 119979, 373955, 1122568, 3255885, 9181781, 25238126, 67893216, 179078191, 464403265, 1185772147, 2986754467, 7429480493, 18276519761, 44500586535, 107358553904, 256796921471, 609508203405

Offset

1,1

Comments

Row 3 of A233062

Links

R. H. Hardin, Table of n, a(n) for n = 1..48

Example

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

Crossrefs

Sequence in context: A182588 A199900 A086504 * A183776 A256021 A172077

Adjacent sequences: A233061 A233062 A233063 * A233065 A233066 A233067

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved