A262782 a(n) = sum_{k=1..n} 3^prime(k).

9, 36, 279, 2466, 179613, 1773936, 130914099, 1293175566, 95436354393, 68725813719276, 686399210003223, 450970305101000586, 36923966682271786989, 365180934076808864616, 26953995293034312152403, 19410199662973054208949126, 14149796291401707558973760193, 141323271117050318101857059796

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Example

a(2) = 3^prime(1) + 3^prime(2) = 3^2+3^3=36.

Mathematica

Accumulate@ Array[3^Prime@ # &, {18}] (* Michael De Vlieger, Mar 24 2016 *)

Prog

(PARI) a(n) = sum(k=1, n, 3^prime(k)); \\ Altug Alkan, Mar 24 2016

Crossrefs

Cf. A057901.

Sequence in context: A027381 A335783 A024120 * A204513 A223306 A272890

Adjacent sequences: A262779 A262780 A262781 * A262783 A262784 A262785

Keyword

nonn,easy

Author

Emre APARI, Mar 24 2016

Extensions

More terms from Michael De Vlieger, Mar 24 2016

Status

approved