

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
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OFFSET

1,2


COMMENTS

a(25) > 2*10^5.


LINKS

Table of n, a(n) for n=1..24.


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



