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 A256471 #7 Mar 30 2015 21:42:30 %S A256471 1,10,14,17,20,90,110,152,176,185,193,230,344,377,391,392,404,441,442, %T A256471 542,1066,1533,1550,1632,1638,1639,1810,2115,2210,2302,2567,2768,2921, %U A256471 3172,3518,3615,3764,4357,4577,4787,4853,5060,5278,6329 %N A256471 Numbers n for which there is an equal number of primes in range [prime(n)^2, prime(n)*prime(n+1)] as there are primes in range [prime(n)*prime(n+1), prime(n+1)^2]. %o A256471 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A256471 (define A256471 (ZERO-POS 1 1 A256470)) %Y A256471 Positions of zeros in A256470. %Y A256471 Cf. A256472, A256473 (the corresponding primes). %K A256471 nonn %O A256471 1,2 %A A256471 _Antti Karttunen_, Mar 30 2015