Number of distinct prime factors in central binomial coefficients C(n, floor(n/2)), the terms of A001405.
A034973
Number of distinct prime factors in central binomial coefficients C(n, floor(n/2)), the terms of A001405.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =2a(7) =3a(8) =3a(9) =3a(10) =4a(11) =4a(12) =4a(13) =4a(14) =4a(15) =5a(16) =5a(17) =5a(18) =5a(19) =5a(20) =6a(21) =6a(22) =6a(23) =6a(24) =6a(25) =6a(26) =6a(27) =6a(28) =7a(29) =7
External references
- oeis: A034973