[seqfan] Re: [math-fun] Triangular+Triangular = Factorial

[Georgi Guninski]

On Tue, Sep 14, 2010 at 10:17:27AM -0600, Richard Guy wrote:
> > then the following sequence of  z  for which
> > 4 * z!  +  1   is prime may be complete for
> > z < 300 or more?? ---  comments?  [not in OEIS]
> >                                     86
> > 0, 1, 2, 4, 7, 8, 9, 13, 16, 28, 54, 129, 190, ...
> >                                     ^
> > R.

http://oeis.org/classic/A076680
Numbers n such that 4*n! + 1 is a prime. 
0, 1, 4, 7, 8, 9, 13, 16, 28, 54, 86, 129, 190, 351, 466, 697, 938,
1510, 3396, 4057, 4384