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!)
A251152 Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
470, 8407, 148833, 2644832, 46958048, 833966807, 14810089440, 263012232516, 4670807329618, 82948521103259, 1473076057445537, 26160241273743965, 464577643321668439, 8250397474900690408, 146518153252603690037 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A251158
LINKS
FORMULA
Empirical: a(n) = 17*a(n-1) +42*a(n-2) -498*a(n-3) -335*a(n-4) +3258*a(n-5) +529*a(n-6) -8805*a(n-7) +550*a(n-8) +7570*a(n-9) +519*a(n-10) -2235*a(n-11) +561*a(n-12) +567*a(n-13) -134*a(n-14) -64*a(n-15) +8*a(n-16)
EXAMPLE
Some solutions for n=3
..0..2..1....2..0..1....0..1..0....0..1..1....2..0..1....0..1..2....0..1..2
..2..2..1....2..1..2....0..0..0....2..0..1....1..0..0....0..0..2....1..0..1
..0..2..1....2..0..1....0..0..1....2..1..1....0..0..2....0..1..2....2..1..1
..0..0..1....2..0..1....0..1..2....1..0..1....0..1..2....2..0..2....2..0..0
CROSSREFS
Sequence in context: A254423 A254416 A251771 * A345535 A345787 A265137
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 April 22 01:34 EDT 2024. Contains 371887 sequences. (Running on oeis4.)