A201276 Number of n X 7 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

1, 3, 27, 54, 740, 2827, 3113, 27008, 71704, 59070, 408600, 894812, 621910, 3704174, 7087046, 4373879, 23558696, 41171126, 23396689, 116650532, 190010902, 101247815, 476808796, 736407602, 373431803, 1678517670, 2482516953, 1208979602, 5235742304, 7477415626

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..175 (terms n = 1..82 from R. H. Hardin)

Example

Some solutions for n=5
..0..0..0..0..0..1..2....0..0..0..0..0..0..2....0..0..0..0..0..0..1
..0..0..0..1..1..1..2....0..0..1..1..1..1..2....0..0..0..1..1..1..2
..0..0..0..1..1..1..2....0..1..1..1..2..2..2....0..0..0..1..1..2..2
..1..1..1..1..2..2..2....0..1..1..1..2..2..2....1..1..1..1..1..2..2
..1..2..2..2..2..2..2....0..1..1..2..2..2..2....1..2..2..2..2..2..2

Crossrefs

Column 7 of A201277.

Sequence in context: A147267 A071183 A025414 * A053360 A176963 A204046

Adjacent sequences: A201273 A201274 A201275 * A201277 A201278 A201279

Keyword

nonn

Author

R. H. Hardin, Nov 29 2011

Extensions

a(0)=1 prepended by Alois P. Heinz, Mar 18 2024

Status

approved