OFFSET
1,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (3,-3,1).
FORMULA
a(n) = 20*n^2 + 3.
G.f.: (3*z^2 + 14*z + 23)/(1-z)^3.
a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3). - G. C. Greubel, Jun 16 2016
MATHEMATICA
Table[20*n^2 + 3, {n, 1, 100] (* or *) LinearRecurrence[{3, -3, 1}, {23, 83, 183}, 100] (* G. C. Greubel, Jun 16 2016 *)
PROG
(PARI) a(n)=20*n^2+3 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Johannes W. Meijer, Nov 10 2009
STATUS
approved