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A105764
Indices of prime Lucas 5-step numbers, A074048.
2
2, 3, 5, 7, 8, 9, 10, 13, 30, 35, 77, 98, 126, 160, 192, 810, 1086, 1999, 2021, 3157, 3426, 3471, 15066, 24115, 29782, 29941
OFFSET
1,1
COMMENTS
No other n < 30000.
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
Eric Weisstein's World of Mathematics, Lucas n-Step Number
MATHEMATICA
a={-1, -1, -1, -1, 5}; lst={}; Do[s=Plus@@a; a=RotateLeft[a]; a[[ -1]]=s; If[PrimeQ[s], AppendTo[lst, n]], {n, 30000}]; lst
CROSSREFS
Cf. A105765 (prime Lucas 5-step numbers).
Sequence in context: A111292 A047373 A039048 * A226811 A227802 A329780
KEYWORD
nonn
AUTHOR
T. D. Noe, Apr 22 2005
STATUS
approved