Number of atomic species of degree n which are not nontrivial substitutions.
A005227
Number of atomic species of degree n which are not nontrivial substitutions.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =6a(6) =19a(7) =20a(8) =111a(9) =116a(10) =567a(11) =641a(12) =4718a(13) =4772a(14) =35489a(15) =46012a(16) =389277a(17) =487408a(18) =4616580
External references
- oeis: A005227