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 A221986 #5 Feb 04 2013 18:31:05 %S A221986 0,3,9,46,479,3711,30830 %N A221986 Number of primes of the form (x+1)^11 - x^11 with x <= 10^n. %C A221986 Number of primes equal to the difference of two consecutive eleventh powers (x+1)^11 - x^11 = 11x(x+1)(x^2+x+1)(x(x+1)(x^2+x+1)(x^2+x+3)+1) +1 (A189055). Values of x = A211184. Sequence of number of primes of the form (x+1)^7 - x^7 with x <= 10^n have similar characteristics to similar sequences for natural primes, cuban primes (A221794) and primes of the form (x+1)^p - x^p for p = 5 (A221849) and p = 7 (A221980). %K A221986 nonn,base %O A221986 0,2 %A A221986 _Vladimir Pletser_, Feb 02 2013