The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A205265 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order 0
 223, 21537, 7191926, 8174802163, 32079295935853, 433101439309430572, 20100570131126768440800 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205273 LINKS EXAMPLE Some solutions for n=3 ..0..0..1..1..1....0..0..0..0..0....0..1..0..0..1....0..0..1..0..1 ..0..1..1..0..0....1..1..0..1..0....1..1..1..0..0....0..1..1..0..1 ..0..0..1..0..0....1..1..1..1..1....1..0..1..1..0....0..0..0..0..0 ..1..1..1..0..1....1..1..1..0..1....0..1..1..1..0....1..0..0..1..0 ..1..0..1..1..0....0..0..1..0..0....1..0..1..0..1....1..1..1..0..0 CROSSREFS Sequence in context: A205266 A152834 A139233 * A153165 A094491 A162604 Adjacent sequences:  A205262 A205263 A205264 * A205266 A205267 A205268 KEYWORD nonn AUTHOR R. H. Hardin Jan 24 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 17 19:51 EDT 2021. Contains 343070 sequences. (Running on oeis4.)