OFFSET
1,2
LINKS
FORMULA
Binomial transform of (1, 4, 5, 0, 0, 0, ...).
a(n) = a(n-1) + 5*n - 6 (with a(1)=1). - Vincenzo Librandi, Nov 23 2010
PROG
(PARI) a(n)=(5*n^2-7*n+4)/2 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Gary W. Adamson, Oct 14 2007
STATUS
approved