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!)
A251027 Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements 1
126955, 334167, 608267, 1199576, 2203974, 4230166, 7948184, 15543033, 30783775, 63428115, 133806457, 290589257, 642273542, 1441935948, 3266407237, 7449665312, 17053708629, 39139562962, 89950860174, 206910386515, 476167313927 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A251028

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) -25*a(n-2) +35*a(n-3) -7*a(n-4) -49*a(n-5) +77*a(n-6) -55*a(n-7) +20*a(n-8) -3*a(n-9) for n>14

EXAMPLE

Some solutions for n=1

..0..0..0..3..0..3..0..3....0..0..3..0..1..0..2..2....0..2..0..0..3..1..2..3

..3..0..0..3..0..3..0..3....3..3..3..0..1..0..0..0....0..2..0..0..3..0..0..0

CROSSREFS

Sequence in context: A230722 A251016 A349284 * A204149 A066690 A189185

Adjacent sequences:  A251024 A251025 A251026 * A251028 A251029 A251030

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 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 August 19 23:59 EDT 2022. Contains 356231 sequences. (Running on oeis4.)