1,1

Next term if it exists is greater than 100000.

Table of n, a(n) for n=1..15.

phi(25)=20, 24=2^3*3^1, (2+3)*(3+1)=20.

Cf. A000010, A039697.

Sequence in context: A083366 A006722 A251413 * A114001 A306838 A171879

Adjacent sequences: A039771 A039772 A039773 * A039775 A039776 A039777

nonn

Olivier Gérard

approved