Doubles (index 2+) under "AGJ" (ordered, elements, labeled) transform.

A032019

Doubles (index 2+) under "AGJ" (ordered, elements, labeled) transform.

Terms

    a(0) =2a(1) =4a(2) =48a(3) =1128a(4) =34320a(5) =1373520a(6) =66662400a(7) =3813742800a(8) =251390391840

External references