Number of atomic species of degree n; also number of connected permutation groups of degree n.

A005226

Number of atomic species of degree n; also number of connected permutation groups of degree n.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =6a(5) =6a(6) =27a(7) =20a(8) =130a(9) =124a(10) =598a(11) =641a(12) =4850a(13) =4772a(14) =35625a(15) =46074a(16) =389839a(17) =487408a(18) =4617554

External references