1,2

Terms were computed by Ed Pegg Jr.; see link for related Mathematica code.

Ed Pegg Jr., The Moebius Function.

a(5)=153=2^2+6^2+7^2+8^2 = sum of squares of primitive roots of prime(5)(=11).

For the first 10 primes the primitive roots are as follows:

{{1}, {2}, {2,3}, {3,5}, {2,6,7,8}, {2,6,7,11}, {3,5,6,7,10,11,12,14}, {2,3,10,13,14,15}, {5,7,10,11,14,15,17,19,20,21}, {2,3,8,10,11,14,15,18,19,21,26,27}}.

Sequence in context: A101946 A029860 A127981 this_sequence A057159 A095941 A002727

Adjacent sequences: A089450 A089451 A089452 this_sequence A089454 A089455 A089456

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Nov 03 2003