A204797 Number of (n+1)X6 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

907, 18550, 270148, 4122638, 60519533, 897624021, 13302221086, 197792658833, 2942082840954, 43794460372476, 652007505839888, 9708650955706316, 144572537862960056, 2152929873533491740, 32061226264300296272

Offset

1,1

Comments

Column 5 of A204800

Links

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

Formula

Empirical: a(n) = 44*a(n-1) -709*a(n-2) +4178*a(n-3) +14975*a(n-4) -337072*a(n-5) +1417073*a(n-6) +2903810*a(n-7) -42888206*a(n-8) +94465992*a(n-9) +306179836*a(n-10) -1722598072*a(n-11) +808737736*a(n-12) +10623736128*a(n-13) -19949811840*a(n-14) -24870817280*a(n-15) +102186867072*a(n-16) -13317484032*a(n-17) -250274585600*a(n-18) +183648323584*a(n-19) +325400336384*a(n-20) -382504878080*a(n-21) -222713896960*a(n-22) +377006850048*a(n-23) +75123064832*a(n-24) -192002129920*a(n-25) -13202620416*a(n-26) +46758100992*a(n-27) +2264924160*a(n-28) -3623878656*a(n-29) for n>40

Example

Some solutions for n=4
..0..1..1..0..0..1....1..0..0..0..0..1....1..0..0..0..1..0....1..1..0..0..1..0
..0..1..1..0..0..0....1..0..1..0..0..1....0..0..1..0..1..0....0..0..0..0..1..0
..0..0..0..0..0..0....1..0..1..0..0..0....0..0..1..0..1..0....0..1..0..0..1..0
..0..1..0..1..0..1....1..0..0..0..1..1....0..0..1..0..1..1....0..1..0..0..1..1
..0..0..0..0..0..1....0..0..1..0..1..1....1..0..0..0..0..1....0..0..0..0..0..1

Crossrefs

Sequence in context: A253347 A253354 A204613 * A303887 A305280 A304893

Adjacent sequences: A204794 A204795 A204796 * A204798 A204799 A204800

Keyword

nonn

Author

R. H. Hardin Jan 19 2012

Status

approved