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!)
A251053 Number of (n+1)X(6+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
12858, 56676, 114512, 262200, 521785, 1081183, 2129846, 4324677, 8753870, 18288333, 38813329, 84501947, 186769920, 419036143, 948331795, 2161174028, 4944248898, 11342696102, 26060422110, 59935245973, 137914961855 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A251055
LINKS
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>12
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..1....3..3..3..3..3..3..3....0..0..0..0..3..0..3
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..3..0..3
..0..0..0..0..0..0..0....2..0..0..0..0..0..0....0..0..0..0..3..0..3
..1..1..1..1..0..0..0....2..0..0..0..0..0..0....1..1..0..0..3..0..3
CROSSREFS
Sequence in context: A246809 A204490 A218457 * A231457 A228675 A268851
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 March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)