Number of involutions (plus identity) in a fixed Sylow 2-subgroup of the symmetric group of degree n.
A332759
Number of involutions (plus identity) in a fixed Sylow 2-subgroup of the symmetric group of degree n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =2a(4) =6a(5) =6a(6) =12a(7) =12a(8) =44a(9) =44a(10) =88a(11) =88a(12) =264a(13) =264a(14) =528a(15) =528a(16) =2064a(17) =2064a(18) =4128a(19) =4128a(20) =12384a(21) =12384a(22) =24768a(23) =24768a(24) =90816a(25) =90816a(26) =181632a(27) =181632a(28) =544896a(29) =544896
External references
- oeis: A332759