A201212 Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards

51, 867, 11932, 146946, 1692945, 18624423, 198262359, 2055746385, 20869314255, 208139081237, 2045065967111, 19837690800848, 190312987378848, 1808321481842796, 17039496826295448, 159395007901738133

Offset

1,1

Comments

Column 4 of A201216

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

Some solutions for n=3
..0..0..0..0....0..0..0..3....0..0..3..2....0..0..2..2....0..0..0..0
..0..3..2..2....0..0..3..3....1..2..3..2....0..2..3..2....0..3..3..2
..2..2..3..3....1..3..3..3....1..1..3..2....2..3..3..3....1..2..2..2

Crossrefs

Sequence in context: A210079 A201832 A317651 * A153221 A172639 A231648

Adjacent sequences: A201209 A201210 A201211 * A201213 A201214 A201215

Keyword

nonn

Author

R. H. Hardin Nov 28 2011

Status

approved