OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (3,-3,1).
FORMULA
G.f.: -(9 + 142*x + 49*x^2)/(x-1)^3. - R. J. Mathar, Mar 20 2018
MATHEMATICA
(10*Range[0, 50] + 3)^2 (* Paolo Xausa, Dec 12 2025 *)
PROG
(Magma) [(10*n+3)^2: n in [0..35]]; // Vincenzo Librandi, Jul 31 2011
(PARI) a(n)=(10*n+3)^2 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved