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 A228520 #14 Sep 03 2013 06:04:10 %S A228520 2,3,11,16,23,41,47,59,67,71,79,101,107,109,127,149,167,169,179,181, %T A228520 227,229,233,239,256,263,269,281,283,307,347,349,359,367,373,401,409, %U A228520 419,431,433,439,461,487,491,521,569,587,593,599,601,607,617,641,643,647 %N A228520 a(n) is the smallest number such that if x >= a(n), then pi^*(x) - pi^*(x/2) >= n, where pi^*(x) is the number of terms of A050376 <= x. %C A228520 The sequence is a Fermi-Dirac analog of Ramanujan numbers (A104272), since terms of A050376 play a role of primes in Fermi-Dirac arithmetic (see comments in A050376). %H A228520 Peter J. C. Moses, <a href="/A228520/b228520.txt">Table of n, a(n) for n = 1..10000</a> %F A228520 a(n)<= R_n, where R_n is the n-th Ramanujan number (A104272); a(n)~A000040(2*n) as n goes to infinity. %Y A228520 Cf. A104272. %K A228520 nonn %O A228520 1,1 %A A228520 _Vladimir Shevelev_, Aug 24 2013 %E A228520 More terms from _Peter J. C. Moses_