A201499 Number of n X n 0..1 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

2, 2, 6, 8, 40, 58, 338, 526, 3334, 5448, 36168, 61108, 417920, 723354, 5054148, 8908546, 63260780, 113093022, 813360930, 1470597342, 10685501398, 19499227828, 142885700222, 262754984020, 1939096937920, 3589093760726, 26647143177214

Offset

1,1

Comments

Diagonal of A201503

Links

R. H. Hardin, Table of n, a(n) for n = 1..39

Example

Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0
..0..0..0..1....0..0..1..1....0..0..1..1....0..0..0..1....0..0..0..1
..0..1..1..1....0..1..1..1....0..0..1..1....0..0..1..1....0..1..1..1
..0..1..1..1....0..1..1..1....0..1..1..1....1..1..1..1....1..1..1..1

Crossrefs

Sequence in context: A169970 A334499 A357950 * A346201 A131553 A277510

Adjacent sequences: A201496 A201497 A201498 * A201500 A201501 A201502

Keyword

nonn

Author

R. H. Hardin Dec 02 2011

Status

approved