[seqfan] Re: Biprimes of K

[L. Edson Jeffery]

Éric,


Very nice, but we need more terms for A026242. I hope someone will take
time to extend the b-file.

If you drop the two ones and let K = {2,3,2,4,3,5,...} with offset 1, then
the sequence of indices for your BIP = 2,3,4,5,8,15,... (non-underlined
elements of K) starts with 1,2,4,6,10,22 which is interesting as well and
not in OEIS (unless it happens to be A005194 which is doubtful).

Ed Jeffery