Basis for code in A075958.

Terms

a(0) =16383a(1) =2080895a(2) =31572879a(3) =107367603a(4) =178951509a(5) =852302358a(6) =7518471868a(7) =26845989734a(8) =45099980558a(9) =80807926649a(10) =413395279134