A091864 Positive integers n such that Sum_{p<=pi(n)} p = n, where pi(x) denotes the number of primes not exceeding x and the summation is over primes p.

5, 17, 41, 77, 100

Offset

1,1

Links

Table of n, a(n) for n=1..5.

S. W. Golomb, A Perfect Property of Handful of 2 Numbers, Problem E3385, Amer. Math. Monthly, 98 (No. 9, 1991), 858-859.

Crossrefs

Sequence in context: A144620 A217622 A269728 * A304079 A109722 A097121

Adjacent sequences: A091861 A091862 A091863 * A091865 A091866 A091867

Keyword

nonn,fini,full

Author

Robert G. Wilson v, Mar 13 2004

Status

approved