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 A086877 #21 Mar 04 2025 23:19:31 %S A086877 5,37,4651,1273609 %N A086877 Primes of the form (k+1)^k - k^k. %H A086877 Sean A. Irvine, <a href="/A086877/b086877.txt">Table of n, a(n) for n = 1..5</a> %F A086877 a(n) = A055869(A098463(n)). - _Elmo R. Oliveira_, Feb 19 2025 %o A086877 (PARI) f(n) = for(x=1,n,y=(x+1)^x-x^x; if(isprime(y),print1(y, ", "))) %Y A086877 The values of k are in A098463. %Y A086877 Primes in A055869. %Y A086877 Cf. A085682. %K A086877 nonn %O A086877 1,1 %A A086877 _Cino Hilliard_, Aug 21 2003