A243139 a(n) = 2^prime(n) + prime(n).

6, 11, 37, 135, 2059, 8205, 131089, 524307, 8388631, 536870941, 2147483679, 137438953509, 2199023255593, 8796093022251, 140737488355375, 9007199254741045, 576460752303423547, 2305843009213694013, 147573952589676412995, 2361183241434822606919

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..200

J. Mestel, Archimedeans Problems Drive 1977, Eureka, 39 (1978), 38-40. (Annotated scanned copy)

Mathematica

f[n_]:=(2^Prime[n] + Prime[n]); Array[f, 80, 1]

Prog

(Magma) [2^p + p: p in PrimesUpTo(80)];

Crossrefs

Cf. A034785, A100105.

Sequence in context: A108698 A002570 A038265 * A288822 A015440 A253209

Adjacent sequences: A243136 A243137 A243138 * A243140 A243141 A243142

Keyword

nonn

Author

Vincenzo Librandi, Jun 03 2014

Status

approved