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

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A232543 Indices of prime tribonacci numbers (A100683). 22
 1, 2, 3, 4, 7, 11, 12, 27, 32, 119, 127, 136, 611, 755, 872, 1676, 5363, 15623, 27564, 42679, 54576, 74123, 91043, 104331 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(25) > 2*10^5. LINKS MATHEMATICA a={-1, 2, 2}; Print[1], Print[2]; For[n=3, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[3]]=sum] CROSSREFS Cf. A001590, A100683, A231574, A231575, A232542. Sequence in context: A296446 A226387 A102282 * A279071 A171027 A064933 Adjacent sequences:  A232540 A232541 A232542 * A232544 A232545 A232546 KEYWORD nonn AUTHOR Robert Price, 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 19 06:37 EST 2020. Contains 331033 sequences. (Running on oeis4.)