0,1

Digital roots yield a hexaperiodic sequence A010888(a(n))= 3*A135265(n+1).

a(n)=3a(n-1)-a(n-3)+3a(n-4).

Sequence in context: A127120 A017940 A038342 this_sequence A084529 A017941 A066972

Adjacent sequences: A135261 A135262 A135263 this_sequence A135265 A135266 A135267

nonn

Paul Curtz (bpcrtz(AT)free.fr), Dec 02 2007

Edited, corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 28 2008