Number of connected functions of n points with no symmetries.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =18a(6) =42a(7) =91a(8) =208a(9) =470a(10) =1089a(11) =2509a(12) =5869a(13) =13730a(14) =32371a(15) =76510a(16) =181708a(17) =432635a(18) =1033656a(19) =2475384a(20) =5943395a(21) =14299532a(22) =34475030a(23) =83263872a(24) =201441431a(25) =488092897a(26) =1184353643a(27) =2877611984a(28) =7000359244a(29) =17049288304