Number of symmetric 13-ary factorizations of the n-cycle (1,2...n).

A192894

Number of symmetric 13-ary factorizations of the n-cycle (1,2...n).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =7a(4) =13a(5) =112a(6) =247a(7) =2310a(8) =5525a(9) =53998a(10) =135408a(11) =1360289a(12) =3518515a(13) =36017352a(14) =95223414a(15) =988172368a(16) =2655417765a(17) =27844071255a(18) =75769712590a(19) =801012669457

External references