a(n) = (A126086(n) - 3*A001850(n) + 2)/6.

A137219

a(n) = (A126086(n) - 3*A001850(n) + 2)/6.

Terms

    a(0) =1a(1) =62a(2) =2649a(3) =116360a(4) =5364701a(5) =256452714a(6) =12582472897a(7) =629389744448

External references