OFFSET
3,1
LINKS
Eric Weisstein's World of Mathematics, Graph Automorphism
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
a(3) = 48, otherwise a(n) = 4n.
From Chai Wah Wu, Apr 14 2024: (Start)
a(n) = 2*a(n-1) - a(n-2) for n > 5.
G.f.: x^3*(36*x^2 - 80*x + 48)/(x - 1)^2. (End)
MATHEMATICA
Join[{48}, 4Range[4, 60]] (* Harvey P. Dale, Aug 10 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Oct 27 2006
STATUS
approved