1,2

a(n) = A003415(A033286(n))= A003415(n*A000040(n)).

a(n) = n + A000040(n)*A003415(n).

a(10) = A003415(A033286(10)) = A003415(A000040(10)*10) = A003415(29*10) = A003415(29)*10 + 29*A003415(10) = 1*10 + 29*(2*1 + 1*5) = 10 + 29*7 = 213.

Sequence in context: A129774 A049373 A002536 this_sequence A099631 A032790 A075273

Adjacent sequences: A068978 A068979 A068980 this_sequence A068982 A068983 A068984

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Apr 01 2002