a(n) = A002182(n) * A324581(n) = A002182(n) * A276086(A002182(n)).

A324582

a(n) = A002182(n) * A324581(n) = A002182(n) * A276086(A002182(n)).

Terms

    a(0) =2a(1) =6a(2) =36a(3) =30a(4) =300a(5) =15000a(6) =1260a(7) =42000a(8) =2940a(9) =288120a(10) =21176820a(11) =18480a(12) =66555720a(13) =328703760a(14) =12298440a(15) =2232166860a(16) =360122920080a(17) =360360a(18) =103062960a(19) =22107004920

External references