Numbers n such that the squarefree kernel of n is equal to the number of divisors of n.

Terms

a(0) =1a(1) =2a(2) =9a(3) =12a(4) =18a(5) =80a(6) =448a(7) =625a(8) =720a(9) =1200a(10) =1250a(11) =1620a(12) =2025a(13) =4032a(14) =4050a(15) =5625a(16) =7500a(17) =9408a(18) =11250a(19) =11264a(20) =20412a(21) =35721a(22) =53248a(23) =71442a(24) =101376a(25) =117649a(26) =235298a(27) =280000a(28) =371712a(29) =479232