1/2 times 3-perfect (triply perfect, tri-perfect, triperfect or sous-double) numbers: a(n) = A005820(n)/2.

A326051

1/2 times 3-perfect (triply perfect, tri-perfect, triperfect or sous-double) numbers: a(n) = A005820(n)/2.

Terms

    a(0) =60a(1) =336a(2) =261888a(3) =229909120a(4) =738152448a(5) =25500590080

External references