The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A251878 Number of (n+2)X(1+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime 1
5495, 11492, 20025, 49529, 117744, 256604, 676969, 1694929, 3850641, 10168955, 25657626, 58789576, 154405779, 390732438, 900368454, 2349009411, 5954768481, 13795315565, 35777536598, 90799627321, 211393940417, 545320046544 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A251885
LINKS
EXAMPLE
Some solutions for n=4
..1..1..3....1..0..1....0..4..1....1..4..2....2..0..0....2..4..1....3..4..0
..2..1..0....1..0..1....4..0..1....1..3..1....0..1..4....3..3..1....1..3..3
..0..1..4....3..2..0....3..3..1....3..4..0....3..1..3....0..0..3....3..4..0
..3..1..1....1..3..1....4..0..3....3..0..4....4..1..0....0..0..3....1..0..4
..4..3..0....3..0..4....0..4..3....1..1..1....0..3..2....3..3..1....1..3..3
..0..3..4....3..4..0....1..3..1....1..1..0....1..1..3....4..0..3....1..4..0
CROSSREFS
Sequence in context: A137816 A138760 A251885 * A251877 A252312 A247924
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 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 30 15:08 EDT 2024. Contains 372968 sequences. (Running on oeis4.)