This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A251202 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2 1
 40, 1246, 102811, 27920380, 29868134632, 129855805888645, 2203266860629332142, 141756509654699247308602, 34090982077422268972865847281, 30409612013209091174685207093821492 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A251210 LINKS R. H. Hardin, Table of n, a(n) for n = 1..11 EXAMPLE Some solutions for n=3 ..2..2..0..2....0..2..2..2....2..2..0..0....1..2..2..1....0..0..0..1 ..0..2..2..2....2..0..0..2....0..0..2..0....1..2..0..1....2..2..0..1 ..0..2..2..0....0..0..2..2....0..2..0..2....0..1..1..0....0..2..2..1 ..0..2..2..2....0..2..0..0....0..0..0..2....2..1..1..2....0..2..2..1 CROSSREFS Sequence in context: A061650 A006101 A278381 * A239189 A188253 A049396 Adjacent sequences:  A251199 A251200 A251201 * A251203 A251204 A251205 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 20 19:27 EDT 2019. Contains 324234 sequences. (Running on oeis4.)