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A178094 a(1)=a(2)=1; thereafter a(n) = lpf(a(n-1)+a(n-2)), where lpf = "least prime factor". 2
1, 1, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7, 2, 3, 5, 2, 7, 3, 2, 5, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Cycles with a period of length 9.

LINKS

Table of n, a(n) for n=1..110.

CROSSREFS

Cf. A000045, A175723, A020639, A178095.

Sequence in context: A272636 A066949 A073481 * A122556 A175723 A084346

Adjacent sequences:  A178091 A178092 A178093 * A178095 A178096 A178097

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 16 2010

STATUS

approved

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Last modified October 22 03:52 EDT 2018. Contains 316431 sequences. (Running on oeis4.)