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.: ( -36-88*x-4*x^2 ) / (x-1)^3. - R. J. Mathar, Aug 26 2015
From Amiram Eldar, Apr 26 2023: (Start)
a(n) = A017137(n)^2.
a(n) = 2^2*A016838(n).
Sum_{n>=0} 1/a(n) = Pi^2/64 - G/8, where G is Catalan's constant (A006752). (End)
MATHEMATICA
Table[(8*n + 6)^2, {n, 0, 30}] (* Amiram Eldar, Apr 26 2023 *)
PROG
(Magma) [(8*n+6)^2: n in [0..35]]; // Vincenzo Librandi, Jul 22 2011
(PARI) a(n)=(8*n+6)^2 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved