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 A206097 Fibonacci numbers F with 2 distinct prime divisors, and F+2 or F-2 also with 2 distinct prime divisors. 0
 55, 4181, 17711, 121393, 5702887 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 55=5*11; (55+2)=3*19, 4181=37*113; (4181+2)=47*89 MATHEMATICA Select[Fibonacci[Range[300]], Last/@FactorInteger[#]=={1, 1} && (Last/@FactorInteger[#+2]=={1, 1} || Last/@FactorInteger[#-2]=={1, 1})&] CROSSREFS Cf. A000045 Sequence in context: A060077 A035323 A250833 * A103918 A013537 A056567 Adjacent sequences: A206094 A206095 A206096 * A206098 A206099 A206100 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Feb 03 2012 STATUS approved

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Last modified November 30 21:57 EST 2022. Contains 358453 sequences. (Running on oeis4.)