Denominators corresponding to A190948.

Terms

a(0) =1a(1) =2a(2) =5a(3) =1a(4) =85a(5) =221a(6) =8177a(7) =204425a(8) =204425a(9) =8381425a(10) =13023445a(11) =10327591885a(13) =115192371025