login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 1
1081, 15353, 268638, 4923412, 91120318, 1688254298, 31288421074, 579864211963, 10746714294838, 199169443650957, 3691227123100251, 68409818406817232, 1267845282798114168, 23497087032329283508, 435473580130021094474 (list; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 6 02:58 EDT 2022. Contains 355108 sequences. (Running on oeis4.)