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
a(n) = 2*a(n-2) - a(n-2) + 200.
a(n) = 50*A056220(n+1) + 1.
a(n+1) - a(n) = 200*n+300 = 100*A144396(n+1).
G.f.: ( -51 - 198*x + 49*x^2 ) / (x-1)^3. - R. J. Mathar, Jul 01 2011
PROG
(Magma) [(10*n+3)*(10*n+17): n in [0..40]]; // Vincenzo Librandi, Jul 28 2011
(PARI) a(n)=100*n*(n+2)+51 \\ Charles R Greathouse IV, Jul 28 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Dec 08 2008
STATUS
approved