This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A204622 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order 1
 12, 2049, 2490558, 21550390395, 1327448018292252, 582081449451902347866, 1816995451072561641887723586, 40376415985445663379679403072064855, 6387126785648912581213165822171077074078454 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A204630 LINKS R. H. Hardin, Table of n, a(n) for n = 1..11 EXAMPLE Some solutions for n=3 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..1..1..0 ..1..0..1..0....1..1..0..2....0..1..2..0....1..1..0..1....1..2..1..2 ..2..1..1..0....2..0..2..1....1..2..2..0....2..2..1..1....0..1..0..1 ..2..0..0..0....1..2..1..0....0..1..1..2....1..1..0..0....2..0..0..1 CROSSREFS Sequence in context: A263584 A323816 A208252 * A004823 A009063 A012675 Adjacent sequences:  A204619 A204620 A204621 * A204623 A204624 A204625 KEYWORD nonn AUTHOR R. H. Hardin Jan 17 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 September 16 03:26 EDT 2019. Contains 327088 sequences. (Running on oeis4.)