This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A254121 #14 Sep 08 2022 08:46:11
%S A254121 7,61,117643,793714773254131,
%T A254121 45671926166590716193865151022383844364247891937,
%U A254121 403343566675122500462878634623535631588559593930513766350645748813807
%N A254121 Primes of the form (n+1)^n - n.
%C A254121 Generated by n = 2, 3, 6, 13, 31, 42, 61, ...
%C A254121 The next term (a(7)) has 110 digits. - _Harvey P. Dale_, Apr 24 2016
%e A254121 7 is in this sequence because (2+1)^2 - 2 = 7 and 7 is prime.
%t A254121 Select[Table[(n+1)^n-n,{n,70}],PrimeQ] (* _Harvey P. Dale_, Apr 24 2016 *)
%o A254121 (Magma) [a: n in [0..100] | IsPrime(a) where a is (n+1)^n - n];
%Y A254121 Cf. A177008.
%K A254121 nonn,less
%O A254121 1,1
%A A254121 _Juri-Stepan Gerasimov_, Jan 25 2015