A175129 a(0)=1, a(1)=3; for n>=2, a(n) = 3^A042950(n-2).

1, 3, 9, 27, 729, 531441, 282429536481, 79766443076872509863361, 6362685441135942358474828762538534230890216321

Offset: 0

Author

Giovanni Teofilatto, Feb 17 2010

Keywords

• nonn

Crossrefs

Cf. A042950, A167182, A172489, A173260.

Extensions

Revised by N. J. A. Sloane, Jun 20 2021