OFFSET

0,1

COMMENTS

The sequence is bounded, namely {a(n)} = {3, 5, 7}, because one of the numbers 2^n + 3, 2^n + 5, 2^n + 7 is divisible by 3. - Thomas Ordowski, Apr 11 2019

LINKS

Amiram Eldar, Table of n, a(n) for n = 0..10000

EXAMPLE

A000079(20) + a(20) = 1048576 + 3 = 1048579 = 7*163*919.

MATHEMATICA

Table[p := 2; While[PrimeQ[2^n + Prime[p]], p++ ]; Prime[p], {n, 0, 150}] (* Stefan Steinerberger, Mar 28 2006 *)

CROSSREFS

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 27 2006

EXTENSIONS

More terms from Stefan Steinerberger, Mar 28 2006

STATUS

approved