Functions on n points with a single labeled point.

Terms

a(0) =0a(1) =1a(2) =4a(3) =15a(4) =52a(5) =175a(6) =571a(7) =1838a(8) =5834a(9) =18363a(10) =57372a(11) =178271a(12) =551344a(13) =1698782a(14) =5217266a(15) =15979465a(16) =48825416a(17) =148877730a(18) =453124341a(19) =1376890744a(20) =4177819301a(21) =12659943750a(22) =38317731349a(23) =115851225052a(24) =349924919167