Number of cycle types of conjugacy classes of all even permutations of n elements.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =6a(7) =8a(8) =12a(9) =16a(10) =22a(11) =29a(12) =40a(13) =52a(14) =69a(15) =90a(16) =118a(17) =151a(18) =195a(19) =248a(20) =317a(21) =400a(22) =505a(23) =632a(24) =793a(25) =985a(26) =1224a(27) =1512a(28) =1867a(29) =2291