0,3

u(n)=u(n+1)=1, u(n+2)=u(n+3)=2 .

a(n)=(1/4)*{2*(n mod 4)+[(n+1) mod 4]+[(n+3) mod 4]}, with n>=0. - Paolo P. Lava (ppl(AT)spl.at), Jul 18 2007

Sequence in context: A089679 A026605 A073783 this_sequence A134430 A014695 A071017

Adjacent sequences: A130655 A130656 A130657 this_sequence A130659 A130660 A130661

nonn

Paul Curtz (bpcrtz(AT)free.fr), Jun 21 2007