a(n) is the least k such that A335294(k) = n, or -1 if no such k exists.

A335337

a(n) is the least k such that A335294(k) = n, or -1 if no such k exists.

Terms

    a(0) =4a(1) =1a(2) =13a(3) =229a(4) =3259a(5) =15739a(6) =449569a(7) =6958841a(8) =130259903a(9) =2404517671a(10) =56014949761a(11) =538155413969

External references