A204796 Number of (n+1)X5 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

335, 4273, 42214, 422426, 4122638, 40446826, 398104735, 3932835872, 38891469208, 384807201698, 3808018050290, 37687209766746, 372993505199870, 3691609000397802, 36536979984636766, 361618824026138898

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 * A348822 A137522 A090487

Adjacent sequences: A204793 A204794 A204795 * A204797 A204798 A204799

Keyword

nonn

Author

R. H. Hardin Jan 19 2012

Status

approved