a(n) is the smallest k such that the p-rank of (Z/kZ)* is 2, where p = prime(n) and (Z/kZ)* is the multiplicative group of integers modulo n.

A307434

a(n) is the smallest k such that the p-rank of (Z/kZ)* is 2, where p = prime(n) and (Z/kZ)* is the multiplicative group of integers modulo n.

Terms

    a(0) =8a(1) =63a(2) =275a(3) =1247a(4) =1541a(5) =4187a(6) =14111a(7) =43739a(8) =6533a(9) =13747a(10) =116003a(11) =33227a(12) =61337a(13) =74563a(14) =186497a(15) =79501a(16) =586343a(17) =269011a(18) =432821a(19) =485357a(20) =128627a(21) =451091a(22) =83333a(23) =191351a(24) =377719a(25) =491063a(26) =638189a(27) =551051a(28) =2617309a(29) =359341

External references