A185565 1/4 the number of nX7 0..3 arrays with no element equal both to the element above and to the element to its left

4096, 45562500, 504547256880, 5586628402633500, 61858104930689319360, 684925618712729136913980, 7583858300260627032845531520, 83972485690826213759616527499540, 929787724653148422947168982361958940

Offset

1,1

Comments

Column 7 of A185567

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X7 with a(1,1)=0
..0..0..0..0..0..0..1....0..0..0..0..1..1..2....0..0..0..0..2..0..2
..0..2..0..2..2..1..3....0..2..0..2..0..0..2....0..2..0..2..1..0..2
..0..0..2..0..0..1..3....0..0..2..0..1..0..3....0..0..2..0..1..3..0

Crossrefs

Sequence in context: A223805 A223583 A222143 * A013849 A016800 A013805

Adjacent sequences: A185562 A185563 A185564 * A185566 A185567 A185568

Keyword

nonn

Author

R. H. Hardin Jan 31 2011

Status

approved