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 A289498 #8 Jul 08 2017 12:17:03 %S A289498 1,0,1,2,1,2,1,2,2,3,2,1,3,4,3,2,2,4,4,3,5,4,5,4,6,4,5,4,4,6,6,6,6,7, %T A289498 6,7,7,6,6,7,5,5,6,7,7,7,8,9,9,8,8,8,9,9,9,9,9,11,11,11,11,10,11,11, %U A289498 10,10,8,9,9,9,9,9,9,10,10,12,13,14,14,13 %N A289498 Number of primes in the interval [7n, 8n]. %H A289498 FUNG Cheok Yin, <a href="/A289498/b289498.txt">Table of n, a(n) for n = 1..10000</a> %Y A289498 Cf. A035250, A289493, A289494, A289495, A289496, A289497, A289499, A289500. %K A289498 nonn,easy %O A289498 1,4 %A A289498 _FUNG Cheok Yin_, Jul 07 2017