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A226869 Number of nX5 (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
16, 199, 2866, 41222, 523701, 5692900, 53537470, 442630782, 3265819433, 21794415254, 133089115844, 750997324318, 3948233068168, 19473426565401, 90637200115088, 400104222792110, 1682355624069512, 6763445214323202 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A226870

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 47

FORMULA

Empirical polynomial of degree 47 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A154240 A081679 A154249 * A257289 A125451 A154348

Adjacent sequences:  A226866 A226867 A226868 * A226870 A226871 A226872

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 20 2013

STATUS

approved

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Last modified May 21 19:10 EDT 2019. Contains 323444 sequences. (Running on oeis4.)