A058522 a(1) = a(2) = 1; a(n+2) = a(n+1) + a(n+1)^a(n).

1, 1, 2, 4, 20, 160020

Offset

1,3

Comments

The next term is 105 digits long.

Links

Table of n, a(n) for n=1..6.

Mathematica

Join[{a=1, b=1}, Table[c=b+b^a; a=b; b=c, {n, 5}]] (* Vladimir Joseph Stephan Orlovsky, Apr 13 2011 *)

Crossrefs

Cf. A058523.

Sequence in context: A326972 A099179 A102049 * A292534 A122736 A296276

Adjacent sequences: A058519 A058520 A058521 * A058523 A058524 A058525

Keyword

easy,nonn

Author

Leroy Quet, Dec 21 2000

Status

approved