Number of non-Abelian metacyclic groups of order p^n (p odd).

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =4a(5) =7a(6) =10a(7) =15a(8) =20a(9) =27a(10) =34a(11) =44a(12) =53a(13) =66a(14) =78a(15) =94a(16) =109a(17) =129a(18) =147a(19) =171a(20) =193a(21) =221a(22) =247a(23) =280a(24) =310a(25) =348a(26) =383a(27) =426a(28) =466a(29) =515