The subsequence A255477(2^n-1).

A255478

The subsequence A255477(2^n-1).

Terms

    a(0) =1a(1) =80a(2) =624a(3) =16480a(4) =221888a(5) =4245888a(6) =66759424a(7) =1158095360a(8) =18967114752a(9) =318729757696

External references