Number of connected functions on n points with a loop of length 9.

Terms

a(0) =1a(1) =1a(2) =6a(3) =30a(4) =127a(5) =506a(6) =1902a(7) =6823a(8) =23673a(9) =79936a(10) =264036a(11) =856772a(12) =2739525a(13) =8652707a(14) =27049259a(15) =83824636a(16) =257847515a(17) =788121922a(18) =2395786374a(19) =7248517868a(20) =21840785100a(21) =65574504200a(22) =196266067194a(23) =585822825763