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 A221847 #18 Jan 30 2013 01:58:28 %S A221847 0,0,1,1,1,1,2,6,7,11,10,26,44,63,112,178,286,507,819,1424,2385,4044, %T A221847 6826,11591,19692,34150,58171,99410,169547,291195,500353,860230, %U A221847 1482979,2554281,4406698 %N A221847 Number of primes of the form (x+1)^5 - x^5 having n digits. %C A221847 Number of primes having n digits and equal to the difference of two consecutive fifth powers (x+1)^5 - x^5 = 5x(x+1)(x^2+x+1)+1 (A121616). Values of x = A121617. Sequence of number of primes having n digits and of the form (x+1)^5 - x^5 have similar characteristics to similar sequences for natural primes (A006879) and cuban primes (A221792). %K A221847 nonn,easy,base %O A221847 0,7 %A A221847 _Vladimir Pletser_, Jan 26 2013