0,1

Binomial transform of A162773. Inverse binomial transform of A163067.

a(n) = ((2+sqrt(5))*(6+sqrt(5))^n+(2-sqrt(5))*(6-sqrt(5))^n)/2.

G.f.: (2-7*x)/(1-12*x+31*x^2).

(MAGMA) [ n le 2 select 15*n-13 else 12*Self(n-1)-31*Self(n-2): n in [1..20] ];

Cf. A162773, A163067.

Sequence in context: A037573 A037741 A037636 this_sequence A110815 A074624 A126037

Adjacent sequences: A163063 A163064 A163065 this_sequence A163067 A163068 A163069

nonn

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jul 20 2009