A254121 Primes of the form (n+1)^n - n.

7, 61, 117643, 793714773254131, 45671926166590716193865151022383844364247891937, 403343566675122500462878634623535631588559593930513766350645748813807

Offset: 1

Author

Juri-Stepan Gerasimov, Jan 25 2015

Keywords

• nonn
• less

Comments

Generated by n = 2, 3, 6, 13, 31, 42, 61, ...

The next term (a(7)) has 110 digits. - Harvey P. Dale, Apr 24 2016

Examples

			7 is in this sequence because (2+1)^2 - 2 = 7 and 7 is prime.
		

Crossrefs

Cf. A177008.

Programs

Magma

[a: n in [0..100] | IsPrime(a) where a is (n+1)^n - n];

Mathematica

Select[Table[(n+1)^n-n,{n,70}],PrimeQ] (* Harvey P. Dale, Apr 24 2016 *)