Least k such that A298475(k) = n.

Terms

a(0) =1a(1) =2a(2) =37a(3) =203a(4) =1332a(5) =13428a(6) =160884a(7) =858740a(8) =10295924a(9) =54958708a(10) =658938484a(11) =3517356660