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) = 40*A000566(n+1) + 9. - Ken Rosenbaum, Dec 02 2009
G.f.: ( -49-142*x-9*x^2 ) / (x-1)^3. - R. J. Mathar, Mar 21 2016
MATHEMATICA
Table[(10n+7)^2, {n, 0, 24}]
PROG
(Magma) [(10*n+7)^2: n in [0..35]]; // Vincenzo Librandi, Aug 03 2011
(PARI) a(n)=(10*n+7)^2 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved