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!)
A251198 Number of (n+1)X(5+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
421, 4172, 49104, 599869, 7392190, 91120318, 1123772109, 13857491196, 170891121600, 2107379861537, 25987915305133, 320477652481276, 3952074277982088, 48736235840108773, 601006370941302525 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A251201

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +118*a(n-2) +279*a(n-3) -1792*a(n-4) -3874*a(n-5) +13807*a(n-6) +15815*a(n-7) -60874*a(n-8) -9844*a(n-9) +120750*a(n-10) -46021*a(n-11) -141005*a(n-12) +176283*a(n-13) -34545*a(n-14) -57511*a(n-15) +27381*a(n-16) +6840*a(n-17) -5394*a(n-18) +98*a(n-19) +271*a(n-20) -11*a(n-21) -4*a(n-22) for n>25

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A302284 A353045 A302732 * A302533 A303414 A242149

Adjacent sequences:  A251195 A251196 A251197 * A251199 A251200 A251201

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 May 22 00:02 EDT 2022. Contains 353931 sequences. (Running on oeis4.)