Doubles (index 2+) under "BGJ" (reversible, element, labeled) transform.

A032057

Doubles (index 2+) under "BGJ" (reversible, element, labeled) transform.

Terms

    a(0) =2a(1) =2a(2) =12a(3) =174a(4) =2880a(5) =67560a(6) =1905960a(7) =63251370a(8) =2418101280a(9) =104707709820

External references