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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A232518 Number of (3+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal 1
 8, 200, 128, 2516, 1730, 32084, 24388, 408486, 338230, 5204242, 4662970, 66327440, 63885378, 845656538, 870767072, 10785923316, 11815519304, 137619885396, 159699421970, 1756562816428, 2151083831244, 22428629238030, 28885857815230 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A232515 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 12*a(n-2) +a(n-3) +11*a(n-4) +a(n-5) -30*a(n-6) -22*a(n-7) +8*a(n-8) +8*a(n-9). Empirical: G.f.: ( -8-200*x-32*x^2-108*x^3+94*x^4+444*x^5+256*x^6-120*x^7-120*x^8 ) / ( -1+12*x^2+x^3+11*x^4+x^5-30*x^6-22*x^7+8*x^8+8*x^9 ). - R. J. Mathar, Nov 23 2014 EXAMPLE Some solutions for n=7 ..1..0..1..2..1..2..1..0....1..2..1..2..1..0..1..2....1..2..1..0..1..0..1..2 ..1..2..1..0..1..0..1..2....1..0..1..2..1..2..1..2....1..0..1..2..1..2..1..0 ..1..2..1..0..1..2..1..0....1..0..1..0..1..2..1..0....1..0..1..0..1..0..1..2 ..1..0..1..0..1..0..1..2....1..2..1..0..1..2..1..0....1..2..1..2..1..2..1..2 CROSSREFS Sequence in context: A208703 A304398 A020329 * A229265 A323562 A034861 Adjacent sequences: A232515 A232516 A232517 * A232519 A232520 A232521 KEYWORD nonn AUTHOR R. H. Hardin, Nov 25 2013 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 August 7 14:45 EDT 2024. Contains 375012 sequences. (Running on oeis4.)