A116016 n+prime(n)+prime(prime(n)) is a cube, where prime(n) is the n-th prime.

34780, 147895, 302689, 449410, 4801151, 6717665

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Example

34780+prime(34780)+prime(prime(34780)) = 6434856 = 186^3.

Prog

(PARI) isok(n) = ispower(n + prime(n) + prime(prime(n)), 3); \\ Michel Marcus, Jan 27 2014

Crossrefs

Cf. A116011, A116012.

Sequence in context: A236141 A103911 A185472 * A253117 A236591 A236727

Adjacent sequences: A116013 A116014 A116015 * A116017 A116018 A116019

Keyword

nonn

Author

Giovanni Resta, Feb 13 2006

Status

approved