Doubles (index 2+) under "CGJ" (necklace, element, labeled) transform.

A032152

Doubles (index 2+) under "CGJ" (necklace, element, labeled) transform.

Terms

    a(0) =2a(1) =2a(2) =12a(3) =150a(4) =2340a(5) =49740a(6) =1282680a(7) =38866170a(8) =1358224140a(9) =53745255060

External references