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 A221846 #15 Jan 30 2013 01:57:10 %S A221846 0,0,1,2,3,4,6,12,19,30,40,66,110,173,285,463,749,1256,2075,3499,5884, %T A221846 9928,16754,28345,48037,82187,140358,239768,409315,700510,1200863, %U A221846 2061093,3544072,6098353,10505051 %N A221846 Number of primes of the form (x+1)^5 - x^5 less than 10^n. %C A221846 Number of primes less than 10^n 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 less than 10^n and of the form (x+1)^5 - x^5 have similar characteristics to similar sequences for natural primes (A006880) and cuban primes (A113478). %K A221846 nonn %O A221846 0,4 %A A221846 _Vladimir Pletser_, Jan 26 2013