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.
Sequence in context: A066850 A066837 A172953 * A132643 A079193 A134908
Adjacent sequences: A132636 A132637 A132638 * A132640 A132641 A132642
nonn
Omar E. Pol (info(AT)polprimos.com), Aug 24 2007
