Product of first n quadrinomial coefficients (A005725) for n > 0 with a(0) = 1.

A386650

Product of first n quadrinomial coefficients (A005725) for n > 0 with a(0) = 1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =30a(4) =930a(5) =93930a(6) =31560480a(7) =35600221440

External references