Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones.
A005421
Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =2a(7) =6a(8) =6a(9) =7a(10) =14a(11) =16a(12) =20a(13) =34a(14) =42a(15) =56a(16) =84a(17) =108a(18) =152a(19) =214a(20) =295a(21) =398a(22) =569a(23) =763a(24) =1094a(25) =1475a(26) =2058a(27) =2878a(28) =3929a(29) =5493
External references
- oeis: A005421