0,2

a(n)= 13*a(n-1) -39*a(n-2) +27*a(n-3) .G.f.: -(1-8*x+9*x^2)/((x-1)*(3*x-1)*(9*x-1)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 25 2009]

Sequence in context: A084135 A138233 A002294 this_sequence A000356 A027392 A109253

Adjacent sequences: A051403 A051404 A051405 this_sequence A051407 A051408 A051409

nonn

clm