a(n) is the smallest integer m such that A039995(m)=n.

Terms

a(0) =1a(1) =2a(2) =13a(3) =23a(4) =113a(5) =131a(6) =137a(7) =1013a(8) =1031a(9) =1273a(10) =1237a(11) =1379a(12) =6173a(13) =10139a(14) =10193a(15) =10379a(16) =10397a(17) =10937a(18) =12397a(19) =12379a(20) =36137a(21) =36173a(22) =101397a(23) =102371a(24) =101937a(25) =102973a(26) =103917a(27) =106937a(28) =109371a(29) =109739