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A034697 a(1)=1, a(n)= 1 + Sum a(p), p prime, p | n-1. 1
1, 1, 2, 3, 2, 3, 4, 5, 2, 3, 4, 5, 4, 5, 6, 5, 2, 3, 4, 5, 4, 7, 6, 7, 4, 3, 6, 3, 6, 7, 6, 7, 2, 7, 4, 7, 4, 5, 6, 7, 4, 5, 8, 9, 6, 5, 8, 9, 4, 5, 4, 5, 6, 7, 4, 7, 6, 7, 8, 9, 6, 7, 8, 7, 2, 7, 8, 9, 4, 9, 8, 9, 4, 5, 6, 5, 6, 9, 8, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

Suggested by Bach and Shallit, Algorithmic Number Theory, I, p. 270.

LINKS

Table of n, a(n) for n=1..80.

CROSSREFS

Cf. A037202.

Sequence in context: A290732 A071487 A124071 * A110157 A178493 A286581

Adjacent sequences:  A034694 A034695 A034696 * A034698 A034699 A034700

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 22 06:02 EDT 2018. Contains 316432 sequences. (Running on oeis4.)