[seqfan] Re: [math-fun] Triangular+Triangular = Factorial
Georgi Guninski
guninski at guninski.com
Thu Sep 16 09:29:10 CEST 2010
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
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