1,3

a(n) = (C(n))^((C(n)).

a(4)=3125 because C(4)=5 and we can write 3125=5^5 or 3125=5*5*5*5*5.

Cf. A000108, A008973, A008974, A051674.

Adjacent sequences: A132636 A132637 A132638 this_sequence A132640 A132641 A132642

Sequence in context: A131587 A066850 A066837 this_sequence A132643 A079193 A134908

nonn

Omar E. Pol (info(AT)polprimos.com), Aug 24 2007