Smallest k such that A349410(k) = n or -1 if no such number exists.

Terms

a(0) =1a(1) =4a(2) =15a(3) =30a(4) =42a(5) =360a(6) =196a(7) =525a(8) =2080a(9) =320a(10) =7168a(11) =123200a(12) =35200a(13) =150920a(14) =196000a(15) =1232000a(16) =61236a(17) =466560a(18) =106831872a(19) =49787136a(20) =14580000a(21) =155648000a(22) =94058496a(23) =123561984a(24) =47385000