

A130614


Integers of the form p^(p2), where p is prime.


1




OFFSET

1,2


COMMENTS

Number of labeled trees on p(n) nodes, where p(n) is the nth prime.


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..77


FORMULA

a(n) = A000272(A000040(n)).


MATHEMATICA

Table[Prime@n^(Prime@n  2), {n, 20}] (* Vincenzo Librandi, Mar 27 2014 *)


PROG

(MAGMA) [n^(n2) : n in [2..40]  IsPrime(n)];
(MAGMA) [p^(p2): p in PrimesUpTo(50)]; // Vincenzo Librandi, Mar 27 2014


CROSSREFS

Cf. A000040, A000272, A036878.
Sequence in context: A219010 A037118 A085531 * A114877 A152859 A241647
Adjacent sequences: A130611 A130612 A130613 * A130615 A130616 A130617


KEYWORD

easy,nonn


AUTHOR

Jonathan Vos Post, Jun 18 2007


STATUS

approved



