0,1

Lkst := proc(n): round(evalf(floor(log10(10*n)))); end; Akst := proc(n): n*(10^(n*Lkst(n))-1)/(10^Lkst(n)-1); end; with(numtheory): [seq(mobius(Akst(i)), i=1..23)];

Cf. A000461.

Sequence in context: A077606 A004601 A114915 this_sequence A004585 A133081 A125999

Adjacent sequences: A074708 A074709 A074710 this_sequence A074712 A074713 A074714

easy,sign

Jani Melik (jani_melik(AT)hotmail.com), Oct 01 2002