A076210 Numbers n such that (-n!!+(n+1)!!+1)/2 is prime.

3, 5, 6, 8, 13, 14, 27, 112, 531, 3795, 4269, 4587, 4910

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Crossrefs

Cf. A006882 (double factorials), A076208, A076209, A076211.

Sequence in context: A033163 A228372 A039869 * A039014 A102989 A005623

Adjacent sequences: A076207 A076208 A076209 * A076211 A076212 A076213

Keyword

nonn

Author

Zak Seidov, Nov 02 2002

Extensions

More terms (checked n<5000) from Hugo Pfoertner, Jun 22 2003

Status

approved