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A242315 Indices of primes in the tribonacci-like sequence A214826. 1
4, 7, 23, 71, 379, 467, 596, 6372, 10100, 11660, 23099, 25419, 26011, 36588, 76895, 112867 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(17) > 2*10^5.
LINKS
Tony D. Noe and Jonathan Vos Post, Primes in Fibonacci n-step and Lucas n-step Sequences, J. of Integer Sequences, Vol. 8 (2005), Article 05.4.4
MATHEMATICA
a={1, 4, 4}; For[n=3, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[3]]=sum]
CROSSREFS
Sequence in context: A027946 A348478 A363543 * A275313 A288299 A288763
KEYWORD
nonn
AUTHOR
Robert Price, May 10 2014
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)