OFFSET
0,1
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 0..78, using David Baugh's b-file from A033844.
Kim Walisch, Fast C++ prime counting function implementation.
EXAMPLE
a(0) = prime(2^0+1) = prime(2) = 3,
a(1) = prime(2+1) = prime(3) = 5,
a(2) = prime(2^2+1) = prime(5) = 11,
a(3) = prime(2^3+1) = prime(9) = 23, and so on. - N. J. A. Sloane, Dec 09 2020
MATHEMATICA
Prime[2^Range[0, 30]+1] (* Harvey P. Dale, Jan 19 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999
STATUS
approved