A034697 a(1)=1, a(n)= 1 + Sum a(p), p prime, p | n-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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

References

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

Crossrefs

Cf. A037202.