The Doudna sequence: write n-1 in binary; power of prime(k) in a(n) is # of 1's that are followed by k-1 0's.

A005940

The Doudna sequence: write n-1 in binary; power of prime(k) in a(n) is # of 1's that are followed by k-1 0's.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =9a(7) =8a(8) =7a(9) =10a(10) =15a(11) =12a(12) =25a(13) =18a(14) =27a(15) =16a(16) =11a(17) =14a(18) =21a(19) =20a(20) =35a(21) =30a(22) =45a(23) =24a(24) =49a(25) =50a(26) =75a(27) =36a(28) =125a(29) =54

External references