Where n appears in A370952, or -1 if n never appears there.

Terms

a(0) =1a(1) =4a(2) =49a(3) =2a(4) =8a(5) =24a(6) =47a(7) =22a(8) =3a(9) =20a(10) =5a(11) =18a(12) =44a(13) =16a(14) =175a(15) =14a(16) =42a(17) =12a(18) =173a(19) =10a(20) =40a(21) =6a(22) =171a(23) =88a(24) =38a(25) =335a(26) =169a(27) =86a(28) =36a(29) =333