The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A252067 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4 0
 92, 152, 1497, 21862, 480464, 16789564, 896763044, 73759241675, 9393184984375, 1838801806417480, 553960321837762317, 257519518174289401204, 184540608154581393175420, 203698879433082432079178119 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A252075 LINKS EXAMPLE Some solutions for n=4 ..2..2..2..2..2..2....2..2..1..2..2..2....2..2..2..1..2..2....1..2..2..2..2..1 ..1..2..2..2..2..2....1..2..2..2..1..2....2..2..2..2..2..2....2..2..2..2..2..2 ..2..2..2..1..2..2....2..2..2..2..2..2....2..2..2..2..2..2....2..1..2..2..2..2 ..2..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..1..2 ..2..2..2..2..2..2....1..2..2..2..2..1....2..2..2..1..2..2....2..2..2..2..2..2 ..2..2..2..2..2..2....2..2..2..2..1..2....2..2..2..2..2..2....1..2..2..2..2..1 CROSSREFS Sequence in context: A046116 A273286 A257761 * A182266 A116215 A272369 Adjacent sequences: A252064 A252065 A252066 * A252068 A252069 A252070 KEYWORD nonn AUTHOR R. H. Hardin, Dec 13 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.

Last modified March 25 03:12 EDT 2023. Contains 361511 sequences. (Running on oeis4.)