1,1

Equivalent definition: primes p for which A007814(p!) is even. Apparently, the sequence is A027697 without the 2 (see A014499). [From R. J. Mathar, Oct 26 2010]

Table of n, a(n) for n=1..55.

Cf. A050376 A000040 A000142

Sequence in context: A245179 A239710 A227921 * A059637 A059308 A075521

Adjacent sequences: A176617 A176618 A176619 * A176621 A176622 A176623

nonn

Vladimir Shevelev, Apr 22 2010

Corrected (37 added, 41 added, 43 removed...) and extended by R. J. Mathar, Oct 26 2010

approved