Number of series-reduced free pure achiral multifunctions with one atom and n positions.

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =4a(9) =7a(10) =9a(11) =14a(12) =21a(13) =32a(14) =45a(15) =69a(16) =103a(17) =153a(18) =224a(19) =338a(20) =500a(21) =746a(22) =1107a(23) =1645a(24) =2447a(25) =3652a(26) =5413a(27) =8052a(28) =11993a(29) =17834