a(n) is the greatest k such that A307730(k) = n.

Terms

a(0) =1a(1) =3a(2) =6a(3) =11a(4) =51a(5) =16a(6) =58a(7) =34a(8) =25a(9) =69a(10) =1384a(11) =45a(12) =1397a(13) =82a(14) =97a(15) =152a(16) =3754a(17) =115a(18) =3773a(19) =223a(20) =135a(21) =1420a(22) =6702a(23) =175a(24) =344a(25) =1445a(26) =202a(27) =251a(28) =6731a(29) =374