A161181 A117805/3.

1, 2, 10, 290, 252010, 190526868290, 108901462620994495704010, 35578585682975584013618831758290462042094536290, 3797507277602505611886017656109365392377072888898472983341161302567287339676755374368286356010

Offset: 0

Author

David Applegate, Jun 05 2009

Keywords

• easy
• nonn

Programs

Mathematica

NestList[#(3#-1)&,1,10]  (* Harvey P. Dale, Apr 01 2011 *)

Formula

a(0)=1, a(n)=a(n-1)*(3*a(n-1)-1)