OFFSET
1,2
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..600
FORMULA
4*F(2n-1) + 7*F(2n) - 6n - 4, with F(n) = A000045(n) (Fibonacci). - Ralf Stephan, Feb 07 2004
G.f. x*(1+8*x-3*x^2) / ((1-x)^2*(1-3*x+x^2)). - Franklin T. Adams-Watters and D. S. McNeil, Dec 16 2011
MATHEMATICA
Table[LucasL[2n + 3] - (6n + 4), {n, 30}] (* Alonso del Arte, Dec 16 2011 *)
PROG
(Magma) [ Lucas(2*n+3) - (6*n+4): n in [1..100]]; // Vincenzo Librandi, Apr 15 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(23) - a(26) from Vincenzo Librandi, Apr 15 2011
STATUS
approved