[seqfan] A180364

[israel at math.ubc.ca]

Speaking of Fabeny: R. J. Mathar commented Dec 10 2010 on his A180364:
"Will this diverge from A016777 at some point?".  It's easy to see that
the answer is no. A180364(n) is  
   floor(A179896(n) / A018252(n)) where A179896(n) mod A018252(n) <> 0
But A179896(n)/A018252(n) is 3/2*(A018252(n)-1), and this is a non-integer
precisely when A018252(n) is even.  Since the n'th even nonprime is 2*n+2,
A180364(n) = floor(3/2*(2*n+1)) = 3*n + 1 = A016777(n).

Shall we recycle A180364?

Cheers,
Robert