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!)
A252990 Number of (n+2)X(4+2) 0..2 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order 1
15395, 136697, 1350439, 14090659, 147972602, 1564485159, 16592413774, 176117806795, 1870443952223, 19874156580697, 211183824250129, 2244286096397298, 23852873329425588, 253514027450350026 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A252993
LINKS
EXAMPLE
Some solutions for n=2
..0..1..1..2..1..1....0..1..0..0..1..1....0..1..0..1..0..0....0..1..1..2..2..0
..0..0..1..0..0..2....1..2..1..1..2..1....0..1..0..0..2..0....1..2..2..0..2..2
..2..1..2..2..0..2....0..1..0..1..1..0....2..2..1..1..2..1....1..1..2..2..1..2
..0..1..1..2..2..0....0..1..0..0..1..0....2..2..0..0..1..0....0..1..1..0..1..1
CROSSREFS
Sequence in context: A054837 A345562 A345817 * A252842 A261724 A031637
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 25 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 June 12 18:55 EDT 2024. Contains 373360 sequences. (Running on oeis4.)