Order of group generated by perfect shuffles of 2n cards.

A007346

Order of group generated by perfect shuffles of 2n cards.

Terms

    a(0) =2a(1) =8a(2) =24a(3) =24a(4) =1920a(5) =7680a(6) =322560a(7) =64a(8) =92897280a(9) =3715891200a(10) =40874803200a(11) =194641920a(15) =160

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