A175129 - OEIS

%I #11 Jun 20 2021 13:19:40

%S 1,3,9,27,729,531441,282429536481,79766443076872509863361,

%T 6362685441135942358474828762538534230890216321

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

%Y Cf. A042950, A167182, A172489, A173260.

%K nonn

%O 0,2

%A _Giovanni Teofilatto_, Feb 17 2010

%E Revised by _N. J. A. Sloane_, Jun 20 2021