A226713 - OEIS

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A226713

Number of nX4 (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X5 binary array

67, 2393, 49019, 977939, 20577215, 439030021, 9326184515, 197633166633, 4188392176965, 88790771781371, 1882395556896109, 39906413076233653, 845997890367543773, 17934778981002807239, 380209955175888381833

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A226717

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..111

EXAMPLE

Some solutions for n=3

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

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

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