OFFSET
1,2
COMMENTS
n*(3n-2) is the n-th octagonal number (A000567).
FORMULA
a(n) = (A003487(n-1)+1)/3 for n >= 2. - Ondrej Kutal, Sep 08 2023
MATHEMATICA
Join[{1}, NestList[ #*(3*# - 2) &, 8, 7]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Vos Post, Nov 15 2004
EXTENSIONS
Edited by Stefan Steinerberger, Jul 25 2007
STATUS
approved