Smallest integer m for which A378568(m) = n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =11a(6) =17a(7) =23a(8) =37a(9) =53a(10) =83a(11) =113a(12) =197a(13) =331a(14) =421a(15) =739a(16) =1087a(17) =1663a(18) =2671a(19) =3847a(20) =5903a(21) =10099a(22) =15061a(23) =24683a(24) =38069a(25) =62099a(26) =96323a(27) =141319a(28) =234863a(29) =367163