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A272637 a(1)=1, a(2)=82; thereafter a(n) = squarefree part of a(n-1)+a(n-2). 3
1, 83, 21, 26, 47, 73, 30, 103, 133, 59, 3, 62, 65, 127, 3, 130, 133, 263, 11, 274, 285, 559, 211, 770, 109, 879, 247, 1126, 1373, 51, 89, 35, 31, 66, 97, 163, 65, 57, 122, 179, 301, 30, 331, 1, 83, 21, 26, 47, 73, 30, 103, 133, 59, 3, 62, 65, 127, 3, 130, 133, 263, 11, 274, 285, 559, 211, 770, 109, 879, 247, 1126, 1373, 51, 89, 35, 31, 66, 97, 163, 65, 57, 122, 179, 301, 30, 331 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Periodic with period length 43. The period is [1, 83, 21, 26, 47, 73, 30, 103, 133, 59, 3, 62, 65, 127, 3, 130, 133, 263, 11, 274, 285, 559, 211, 770, 109, 879, 247, 1126, 1373, 51, 89, 35, 31, 66, 97, 163, 65, 57, 122, 179, 301, 30, 331].

REFERENCES

Fred W. Helenius, Posting to Math Fun Mailing List, May 06 2016

LINKS

Table of n, a(n) for n=1..86.

CROSSREFS

Cf. A272636.

Sequence in context: A324674 A113890 A051327 * A317915 A033403 A174092

Adjacent sequences:  A272634 A272635 A272636 * A272638 A272639 A272640

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 05 2016

STATUS

approved

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Last modified September 24 18:11 EDT 2022. Contains 356949 sequences. (Running on oeis4.)