OFFSET
1,1
COMMENTS
a(n) = 729n^2 + n for n < 57, but a(57) = 2289224. - Charles R Greathouse IV, Aug 04 2017
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved