Number of set-like atomic species of degree n.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =6a(7) =1a(8) =10a(9) =4a(10) =12a(11) =1a(12) =33a(13) =1a(14) =29a(15) =13a(16) =64a(17) =1a(18) =100a(19) =1a(20) =156a(21) =30a(22) =187a(23) =1a(24) =443a(25) =10a(26) =476a(27) =78a(28) =877a(29) =1