a(n) = smallest m such that A131644(m) = n, or -1 if n does not appear in A131644.

Terms

a(0) =1a(1) =2a(2) =3a(3) =13a(4) =7a(5) =19a(6) =59474a(7) =7177a(8) =14a(9) =37a(10) =158a(11) =25a(12) =20a(13) =1759a(14) =181a(15) =59a(16) =18a(17) =229a(18) =38a(19) =237a(20) =26a(21) =3301a(22) =358a(23) =49a(24) =76a(25) =29a(26) =34a(27) =75359a(28) =106a(29) =71