1,1

Except initial term, a(n) - 1 is not square-free number.

a(n) = A049002(n) + 2.

Cf. A049002.

Sequence in context: A001255 A133019 A028866 this_sequence A068373 A068888 A030481

Adjacent sequences: A146978 A146979 A146980 this_sequence A146982 A146983 A146984

nonn

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 04 2008