A057902 a(n) = 5^prime(n).

25, 125, 3125, 78125, 48828125, 1220703125, 762939453125, 19073486328125, 11920928955078125, 186264514923095703125, 4656612873077392578125, 72759576141834259033203125, 45474735088646411895751953125

Offset: 1

Author

Henry Bottomley, Sep 29 2000

Keywords

• nonn

Examples

			a(4) = 5^7 = 78125.
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 1..200

Crossrefs

Cf. A000040, A034785, A053810, A057902, A132797.

Programs

Maple

A057902:=n->5^ithprime(n); seq(A057902(n), n=1..30); # Wesley Ivan Hurt, Jun 14 2014

Mathematica

5^Prime@Range@30 (* Vladimir Joseph Stephan Orlovsky, Apr 11 2011 *)

Formula

a(n) = 5^A000040(n).

Sum_{n>=1} 1/a(n) = A132797. - Amiram Eldar, Aug 11 2020