Number of free pure achiral multifunctions (with empty expressions allowed) with one atom and n positions.

A317882

Number of free pure achiral multifunctions (with empty expressions allowed) with one atom and n positions.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =12a(5) =31a(6) =79a(7) =211a(8) =564a(9) =1543a(10) =4259a(11) =11899a(12) =33526a(13) =95272a(14) =272544a(15) =784598a(16) =2270888a(17) =6604900a(18) =19293793a(19) =56581857a(20) =166523462a(21) =491674696a(22) =1455996925a(23) =4323328548a(24) =12869353254a(25) =38396655023a(26) =114803257039a(27) =343932660450

External references