Smallest m such that A199238(m) = n.

Terms

a(0) =1a(1) =3a(2) =11a(3) =15a(4) =59a(5) =95a(6) =223a(7) =255a(8) =1007a(9) =1919a(10) =4091a(11) =6143a(12) =16379a(13) =28671a(14) =61439a(15) =65535a(16) =261119a(17) =516095a(18) =1048571a(19) =1966079a(20) =4128767a(21) =8380415a(22) =16769023a(23) =25165823a(24) =67108799a(25) =134184959a(26) =268434431a(27) =469762047a(28) =1073741819a(29) =2013265919