Doubles (index 2+) under "CHJ" (necklace, identity, labeled) transform.

A032336

Doubles (index 2+) under "CHJ" (necklace, identity, labeled) transform.

Terms

    a(0) =2a(1) =2a(2) =24a(3) =366a(4) =7980a(5) =212880a(6) =6974520a(7) =267915690a(8) =11862673620a(9) =594440826420

External references