A187750 Recursively adding to a sum beginning with 1 the product of the smallest k primes not dividing the predecessor yields a prime for these values of k.

1, 2, 3, 6, 8, 10, 11, 18, 20, 32, 50, 110, 153, 507, 727, 900, 982, 1489, 1737, 1974, 3085

Offset

1,2

Comments

See A209296 for a fuller description, a program and examples.

a(21)=3085 refers to a 12207-digit prime.

Links

Table of n, a(n) for n=1..21.

Crossrefs

Sequence in context: A047403 A286051 A093193 * A089422 A316571 A165780

Adjacent sequences: A187747 A187748 A187749 * A187751 A187752 A187753

Keyword

nonn

Author

James G. Merickel, Jan 03 2013

Status

approved