A081651 a(n) = floor((3/2)^^n), where x^^n is the power tower x^(x^(...^x)) with n x's.

1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 5, 10, 86, 1499263005586576

Offset

0,4

Links

Table of n, a(n) for n=0..13.

Mathematica

f[n_] := (3/2)^n; Floor[ NestList[f, 3/2, 12]]

Crossrefs

Cf. A014221.

Sequence in context: A275882 A005139 A005134 * A269333 A029193 A308052

Adjacent sequences: A081648 A081649 A081650 * A081652 A081653 A081654

Keyword

nonn

Author

Robert G. Wilson v, Mar 26 2003

Extensions

New definition from Benoit Jubin, Jul 22 2008

Inserted a missing 1 at the beginning, Benoit Jubin, Aug 04 2008

Status

approved