Obverse convolution (1)**A001950; see Comments.

A374864

Obverse convolution (1)**A001950; see Comments.

Terms

    a(0) =1a(1) =3a(2) =18a(3) =144a(4) =1584a(5) =22176a(6) =354816a(7) =6741504a(8) =141571584a(9) =3397718016a(10) =91738386432

External references