Number of connected functions of n points with no fixed points and with no symmetries.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =12a(6) =30a(7) =66a(8) =156a(9) =357a(10) =842a(11) =1961a(12) =4643a(13) =10960a(14) =26072a(15) =62084a(16) =148499a(17) =355784a(18) =855038a(19) =2058536a(20) =4967099a(21) =12005308a(22) =29067646a(23) =70483478a(24) =171158311a(25) =416168250a(26) =1013156687a(27) =2469301316a(28) =6024696764a(29) =14713845227