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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A183426 Half the number of n X 3 0..2 arrays with no element equal its row sum plus its column sum mod 3. 1
 9, 32, 256, 2097, 16384, 131072, 1048959, 8388608, 67108864, 536873985, 4294967296, 34359738368, 274877931519, 2199023255552, 17592186044416, 140737488551937, 1125899906842624, 9007199254740992, 72057594039500799 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A183429. LINKS R. H. Hardin, Table of n, a(n) for n = 1..161 FORMULA Empirical: a(n) = 8*a(n-1) + 7*a(n-3) - 56*a(n-4) + 8*a(n-6) - 64*a(n-7). Empirical g.f.: x*(9 - 40*x - 14*x^3 - 112*x^4 - 32*x^6) / ((1 + x)*(1 - 2*x)*(1 - 8*x)*(1 - x + x^2)*(1 + 2*x + 4*x^2)). - Colin Barker, Mar 29 2018 EXAMPLE Some solutions for 4X3 ..1..1..2....0..2..1....2..2..2....2..2..2....2..2..1....0..0..2....2..1..0 ..1..0..1....1..0..0....1..0..0....0..1..1....1..2..1....1..2..0....2..1..1 ..0..2..2....0..2..0....0..1..2....1..1..1....2..2..1....1..0..0....1..0..1 ..2..2..1....1..0..2....1..0..0....0..2..2....2..2..1....0..1..2....1..0..2 CROSSREFS Cf. A183429. Sequence in context: A300773 A317279 A196016 * A061913 A264512 A231764 Adjacent sequences: A183423 A183424 A183425 * A183427 A183428 A183429 KEYWORD nonn AUTHOR R. H. Hardin, Jan 04 2011 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 September 15 18:36 EDT 2024. Contains 375954 sequences. (Running on oeis4.)