A251199 Number of (n+1)X(6+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements

1081, 15353, 268638, 4923412, 91120318, 1688254298, 31288421074, 579864211963, 10746714294838, 199169443650957, 3691227123100251, 68409818406817232, 1267845282798114168, 23497087032329283508, 435473580130021094474

Offset

1,1

Comments

Column 6 of A251201

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +287*a(n-2) +1130*a(n-3) -12616*a(n-4) -48060*a(n-5) +294590*a(n-6) +714706*a(n-7) -4215124*a(n-8) -3637992*a(n-9) +34258426*a(n-10) -9071566*a(n-11) -149917455*a(n-12) +180182722*a(n-13) +203004483*a(n-14) -391157500*a(n-15) -207871972*a(n-16) +520621096*a(n-17) +174582101*a(n-18) -486567998*a(n-19) -41959607*a(n-20) +184075326*a(n-21) +84598884*a(n-22) -67114240*a(n-23) -50128530*a(n-24) +21845566*a(n-25) +12740072*a(n-26) -3903472*a(n-27) -1764730*a(n-28) +327790*a(n-29) +137151*a(n-30) -9862*a(n-31) -5231*a(n-32) -64*a(n-33) +68*a(n-34) +4*a(n-35) for n>39

Example

Some solutions for n=2
..1..1..0..1..1..0..1....1..0..0..1..1..1..1....1..1..0..1..0..1..0
..1..1..1..1..1..1..1....0..0..1..1..1..1..0....0..1..1..1..1..1..1
..0..1..1..1..1..1..0....0..1..1..0..1..0..1....1..0..1..0..1..1..1

Crossrefs

Sequence in context: A077740 A338407 A078214 * A220334 A221295 A220687

Adjacent sequences: A251196 A251197 A251198 * A251200 A251201 A251202

Keyword

nonn

Author

R. H. Hardin, Nov 30 2014

Status

approved