OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..6
FORMULA
2*a(n+1) + 1 = ( 2*a(n) + 1 )^3.
MATHEMATICA
Table[(3^(3^m) -1)/2, {m, 0, 10}]
PROG
(Sage) [(3^(3^n) -1)/2 for n in (0..10)] # G. C. Greubel, Apr 25 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Feb 20 2010
EXTENSIONS
Introduced standard nomenclature in the definition, added recurrence - the Assoc. Editors of the OEIS, Feb 24 2010
STATUS
approved