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 A231158 #13 Feb 16 2025 08:33:20 %S A231158 0,42,780,9445,100203,1034545,10493487 %N A231158 Number of Gram blocks [g(j), g(j+2)) up to 10^n with 0 <= j < 10^n. %C A231158 We call a Gram point g(j) "good" if j is not in A114856, and "bad" otherwise. A "Gram block of length k" is an interval [g(j), g(j+k)) such that g(j) and g(j+k) are good Gram points, g(j+1), ..., g(j+k-1) are bad Gram points, and k >= 1. %H A231158 Richard P. Brent, <a href="http://www.ams.org/journals/mcom/1979-33-148/S0025-5718-1979-0537983-2/">On the Zeros of the Riemann Zeta Function in the Critical Strip</a>, Math. Comp. 33 (1979), pp. 1361-1372. %H A231158 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GramBlock.html">Gram Block</a> %H A231158 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GramPoint.html">Gram Point</a> %Y A231158 Cf. A114856, A231157, A231159-A231165. %K A231158 nonn,more %O A231158 2,2 %A A231158 _Arkadiusz Wesolowski_, Nov 04 2013