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A226715 Number of nX6 (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X7 binary array 1
491, 80043, 6045209, 439030021, 34404755041, 2753775365011, 219013376708219, 17350805966693235, 1374728293480549343, 108981170244590729059, 8640242984064796760609, 684976188236943531208499 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A226717

LINKS

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

EXAMPLE

Some solutions for n=3

.-1.-1..0..0..1..0...-1.-1..0..1..0..0...-1.-1..0..1.-1..1...-1.-1..0..0.-1..1

..1..1..0..0.-1..0....1..1..0.-1..1..1...-1..1..0.-1..0..0....0..1..0..0.-1..0

..0..1.-1..0..1..0....0.-1..0..0..0.-1....1.-1..1..1..0.-1....1..0..0..0..1..0

CROSSREFS

Sequence in context: A205200 A205058 A229520 * A205819 A234672 A234667

Adjacent sequences:  A226712 A226713 A226714 * A226716 A226717 A226718

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 15 2013

STATUS

approved

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Last modified April 9 08:41 EDT 2020. Contains 333344 sequences. (Running on oeis4.)