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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 2
4096, 45562500, 504547256880, 5586628402633500, 61858104930689319360, 684925618712729136913980, 7583858300260627032845531520, 83972485690826213759616527499540, 929787724653148422947168982361958940 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 4 16:26 EDT 2022. Contains 355081 sequences. (Running on oeis4.)