If n is squarefree then a(n) = Min{k | A070077(k) = n} else 0.

Terms

a(0) =1a(1) =2a(2) =3a(3) =0a(4) =60a(5) =106a(6) =217a(7) =0a(8) =0a(9) =409a(10) =276a(11) =0a(12) =120a(13) =129a(14) =376a(15) =0a(16) =157a(17) =0a(18) =175a(19) =0a(20) =1086a(21) =899a(22) =365a(23) =0a(24) =0a(25) =1343a(26) =0a(27) =0a(28) =2630a(29) =4068