This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A102516 Sum C(n-3k,3k+1), k=0..floor(n/6). 1
 0, 1, 2, 3, 4, 5, 6, 8, 13, 24, 45, 81, 138, 224, 352, 546, 851, 1348, 2175, 3556, 5843, 9582, 15624, 25317, 40836, 65737, 105863, 170796, 276160, 447272, 724968, 1174985, 1903186, 3080367, 4982688, 8057421, 13029534, 21074012, 34094041 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1,0,0,1). FORMULA G.f.: x(1-x)/((1-x)^3-x^6); a(n)=sum{k=0..floor(n/6), C(n-3k, 3k+1)}. MATHEMATICA LinearRecurrence[{3, -3, 1, 0, 0, 1}, {0, 1, 2, 3, 4, 5}, 40] (* Harvey P. Dale, Aug 06 2018 *) CROSSREFS Cf. A101551. Sequence in context: A033071 A306075 A049432 * A156981 A271949 A039089 Adjacent sequences:  A102513 A102514 A102515 * A102517 A102518 A102519 KEYWORD easy,nonn AUTHOR Paul Barry, Jan 13 2005 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 15 14:07 EDT 2018. Contains 316236 sequences. (Running on oeis4.)