[seqfan] new sequence

[zak seidov]

NAME Interleaved semiprimes and  primes  
DATA
4, 2, 6, 3, 9, 5, 10, 7, 14, 11, 15, 13, 21, 17, 22, 19, 25, 23, 26, 29, 33,
 31, 34, 37, 35, 41, 38, 43, 39, 47, 46, 53, 49, 59, 51, 61, 55, 67, 57,
 71, 58, 73, 62, 79, 65, 83, 69, 89, 74, 97, 77, 101, 82, 103, 85, 107,
 86, 109, 87, 113 COMMENTS For odd n's a(n) = A129767(n+1), for even n's  a(n) = A129767(n-1),  
Cf. A129767
more(?).