Duplicate of A085876.

Terms

a(0) =2a(1) =18a(2) =35a(3) =66a(4) =4a(5) =84a(6) =344a(7) =1692a(8) =1785a(9) =270a(10) =4293a(11) =1176a(12) =9315a(13) =1458a(14) =3450a(15) =5304a(16) =2656