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) = A017029(n)^2. - Michel Marcus, Nov 11 2013
Sum{n>=0} 1/a(n) = psi'(4/7)/49 = 0.080438723... - R. J. Mathar, May 07 2024
MAPLE
MATHEMATICA
Table[(7n+4)^2, {n, 0, 100}] (* Wesley Ivan Hurt, Nov 11 2013 *)
LinearRecurrence[{3, -3, 1}, {16, 121, 324}, 40] (* Harvey P. Dale, May 25 2019 *)
PROG
(Magma) [(7*n+4)^2: n in [0..40] ]; // Vincenzo Librandi, Jul 16 2011
(PARI) a(n)=(7*n+4)^2 \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved