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

7, 61, 117643, 793714773254131, 45671926166590716193865151022383844364247891937, 403343566675122500462878634623535631588559593930513766350645748813807

Offset

1,1

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

Links

Table of n, a(n) for n=1..6.

Example

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

Mathematica

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

Prog

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

Crossrefs

Cf. A177008.

Sequence in context: A048287 A317430 A145507 * A047685 A171078 A368057

Adjacent sequences: A254118 A254119 A254120 * A254122 A254123 A254124

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Jan 25 2015

Status

approved