[seqfan] Re: Terms in A112801 (n=sum of three semiprimes)

[Don Reble]

> I face problems reproducing the terms in A112801. ...
> 2*9-1 = 17 = 4+4+9
> ...
> The sequence would not continue
> 1, 0, 1, 2, 2, 2, 4, 4, 4... but
> 1, 1, 1, 2, 2, 3, 4, 2, 5, 5, 4, 6, 7, 6 (?!)


> Perhaps it is only odd semiprimes?


    I get the same terms as the authors. It has nothing to do with
    semiprimes, but "integers with 2 distinct prime factors".
    (A007774: 6, 10, 12, 14, 15, 18, 20, 21, ...)

-- 
Don Reble  djr at nk.ca