First occurrence of n in A213859.

Terms

a(0) =2a(1) =0a(2) =1a(3) =3a(4) =4a(5) =2949a(6) =8a(7) =11a(8) =12a(9) =15a(10) =17a(11) =115a(12) =20a(13) =7863275a(14) =24a(15) =27a(16) =16a(17) =73a(18) =32a(19) =35a(20) =25a(21) =39a(22) =33a(23) =103a(24) =38a(26) =228a(27) =51a(28) =119a(29) =97a(30) =56