a(n) is the least number k such that A377208(k) = n, or -1 if no such number exists.
A377211
a(n) is the least number k such that A377208(k) = n, or -1 if no such number exists.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =24a(4) =180a(5) =1056a(6) =2592a(7) =15552a(8) =46656a(9) =544320a(10) =20528640a(11) =238085568a(12) =3547348992a(13) =46438023168a(14) =599501979648
External references
- oeis: A377211