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A014981 a(n)=c(p(n))/p(n), where c = Perrin sequence A001608 (starting 0,2,3,...) and p(n) = n-th prime. 4
1, 1, 1, 1, 2, 3, 7, 11, 28, 120, 197, 892, 2479, 4148, 11687, 56010, 271913, 461529, 2270882, 6599404, 11263855, 56250108, 164879269, 830987861, 7231032935, 21386730355, 36802336319, 109099442316, 187943217386 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

REFERENCES

An Insufficient Condition for Primality, Problem 10268, American Mathematical Monthly, v. 103, n. 10, p. 911, Dec. 1996.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..1000 (terms 1..200 from T. D. Noe)

CROSSREFS

See A001608, the main entry for the Perrin sequence.

Cf. A000040, A052338, A064723.

Sequence in context: A214938 A143926 A112840 * A227885 A096362 A005479

Adjacent sequences:  A014978 A014979 A014980 * A014982 A014983 A014984

KEYWORD

nonn,easy,nice

AUTHOR

Clark Kimberling, Robert G. Wilson v

STATUS

approved

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Last modified February 21 20:28 EST 2020. Contains 332111 sequences. (Running on oeis4.)