0,2

a(n) = 5*a(n-1) + a(n-2) + 5 for n>1, with a(0)=1, a(1)=4. G.f.: Sum_{n>=1} a(n)*x^n/n = log((1-x)/(1-5*x-x^2)).

(PARI) a(n)=if(n==0, 1, n*polcoeff(log((1-x)/(1-5*x-x^2)+x*O(x^n)), n))

Cf. A100233, A100235.

Equals A087130(n) - 1.

Sequence in context: A147621 A058408 A053906 this_sequence A144068 A121767 A092167

Adjacent sequences: A100233 A100234 A100235 this_sequence A100237 A100238 A100239

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Nov 30 2004