A052290 Prime values of n!*2^n+n+1 = A000165(n)+n+1.

2, 11, 389, 1961990553613, 1678343852714360832019, 25563186766285862273530264901662157745369907200000037

Offset: 1

Author

Labos Elemer, Feb 08 2000

Keywords

• nonn

Comments

For a(6), n = 36. There are no additional terms up to n=1000. - Harvey P. Dale, Aug 06 2012

Primes for n = 0, 2, 4, 12, 18, 36, and no others for n < 5001. - Robert G. Wilson v, Aug 07 2012

Examples

			If n=4, 2^4*4!+4+1 = 389 is prime, so 389 is a term.
		

Crossrefs

Cf. A000165, A052289.

Programs

Mathematica

Select[Table[n! 2^n+n+1,{n,0,1000}],PrimeQ] (* Harvey P. Dale, Aug 06 2012 *)