




OFFSET

1,1


COMMENTS

For n < 20, A290044(n) are prime when n = {2, 3, 9, 13}.
For n >= 20, 19A290044(n). Therefore there are only 4 terms in this sequence.


LINKS



EXAMPLE

41 = 0!!  2!! + 4!!  6!! is prime.


MATHEMATICA

Select[Table[Abs@ Sum[(1)^k*(2 k)!!, {k, 0, n}], {n, 0, 60}], PrimeQ] (* Michael De Vlieger, Jul 19 2017 *)


CROSSREFS



KEYWORD

nonn,fini,full


AUTHOR



STATUS

approved



