The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A069103 a(1) = 1; a(2) = 1; a(n) = prime(a(n-1)) + prime(a(n-2)) if n > 2. 5
 1, 1, 4, 9, 30, 136, 882, 7626, 84448, 1159912, 19226112, 376464500, 8556370952, 222510227460, 6542050923204, 215278202878118, 7860760142260830, 316135809596510856 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE a(3) = prime(a(2)) + prime(a(1)) = 2 + 2 = 4. MATHEMATICA f[x_] := Prime[f[x-1]]+Prime[f[x-2]] {f[1]=1, f[2]=1}; Table[f[w], {w, 1, 15}] nxt[{a_, b_}]:={b, Prime[a]+Prime[b]}; Join[{1}, Union[Flatten[NestList[nxt, {1, 1}, 13]]]] (* Harvey P. Dale, Sep 17 2013 *) CROSSREFS Sequence in context: A105865 A187983 A230056 * A041137 A042599 A206960 Adjacent sequences:  A069100 A069101 A069102 * A069104 A069105 A069106 KEYWORD nonn,more AUTHOR Joseph L. Pe, Apr 06 2002 EXTENSIONS More terms from Labos Elemer, Apr 11 2003 a(16)-a(18) from Chai Wah Wu, Sep 18 2019 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 April 8 02:27 EDT 2020. Contains 333312 sequences. (Running on oeis4.)