Numbers k such that Sum_{j=1..k} (sigma(j) + phi(j) + tau(j)) == 0 (mod k).

A227008

Numbers k such that Sum_{j=1..k} (sigma(j) + phi(j) + tau(j)) == 0 (mod k).

Terms

    a(0) =1a(1) =399a(2) =872a(3) =1214a(4) =2090a(5) =5200a(6) =5588a(7) =21208a(8) =29152a(9) =638049a(10) =1627676a(11) =151732410a(12) =274845607a(13) =3224070252a(14) =54892040166a(15) =69020111756a(16) =175288968221

External references