A230607 Primes in the tribonacci-like sequence A214899.

2, 2, 5, 173, 1979, 10035601, 1314434453, 15043078019, 75946890143515970461691, 9947307490759622919990767, 33651500197152003774080593, 113842209720657202395344053, 577291982170349695261586984393, 33503139717732963900675717496847941

Offset: 1

Author

Robert Price, Dec 05 2013

Keywords

• nonn

Crossrefs

Cf. A001590, A100683, A231574, A231575, A232543, A214899.

Programs

Mathematica

a={2,1,2}; Print[2]; Print[2]; For[n=3, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[3]]=sum]
Select[LinearRecurrence[{1,1,1},{2,1,2},300],PrimeQ] (* Harvey P. Dale, Jul 30 2015 *)

Extensions

More terms from Harvey P. Dale, Jul 30 2015