a(n) = A075399(n)/n.

Terms

a(0) =1a(1) =1a(2) =37a(3) =28a(4) =1a(5) =1852a(6) =3016a(7) =138889a(8) =12345679a(9) =0a(10) =0a(11) =925925926a(12) =1624008547a(13) =8007936508a(14) =740740741a(15) =694444444507a(19) =0