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A204796 Number of (n+1)X5 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing 1
335, 4273, 42214, 422426, 4122638, 40446826, 398104735, 3932835872, 38891469208, 384807201698, 3808018050290, 37687209766746, 372993505199870, 3691609000397802, 36536979984636766, 361618824026138898 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204800

LINKS

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

FORMULA

Empirical: a(n) = 23*a(n-1) -169*a(n-2) +215*a(n-3) +2942*a(n-4) -13270*a(n-5) +5608*a(n-6) +79132*a(n-7) -156472*a(n-8) -56040*a(n-9) +403184*a(n-10) -196800*a(n-11) -346880*a(n-12) +287744*a(n-13) +89088*a(n-14) -98304*a(n-15) for n>23

EXAMPLE

Some solutions for n=4

..1..0..0..0..0....0..0..1..0..1....0..0..0..0..0....0..0..1..0..0

..1..0..1..0..1....1..0..0..0..1....0..0..0..1..1....1..0..0..0..0

..1..0..1..0..1....1..0..0..0..1....1..1..0..1..1....0..0..0..0..1

..0..0..0..0..0....0..0..1..0..1....0..0..0..1..1....1..0..0..0..0

..1..1..1..1..0....1..0..0..0..1....0..0..0..0..1....0..0..1..0..1

CROSSREFS

Sequence in context: A253346 A253353 A204612 * A137522 A090487 A289220

Adjacent sequences:  A204793 A204794 A204795 * A204797 A204798 A204799

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 2012

STATUS

approved

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Last modified June 14 10:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)