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 A337916 #19 Feb 16 2025 08:34:00 %S A337916 1409635,74627996,98011434,109454388,153236152,191545190,392460356, %T A337916 427203833,497768756,504982791,538208841,538565394,541301742, %U A337916 549096232,590970836,591800035,623392556,660872395,698269314,779613836,796944116,839316232,884093036,1045217422,1118176194 %N A337916 Numbers k such that four (or more) consecutive Ramanujan tau numbers are congruent mod 691, or A000594(k) == A000594(k+1) == A000594(k+2) == A000594(k+3) mod 691, or A046694(k) = A046694(k+1) = A046694(k+2) = A046694(k+3). %C A337916 The corresponding Ramanujan tau numbers mod 691 are listed in A337917(n) = A046694(a(n)). See A121742 for more information. %H A337916 Jud McCranie, <a href="/A337916/b337916.txt">Table of n, a(n) for n = 1..1419</a> %H A337916 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TauFunction.html">Tau Function</a>. %e A337916 Ramajuan tau A000594(1045217422) == A000594(1045217423) == A000594(1045217424) == A000594(1045217425) == 269, so 1045217422 is in the sequence. %Y A337916 Cf. A121742, A337917, A000594, A046694, A121733, A121734, A121743. %K A337916 nonn %O A337916 1,1 %A A337916 _Jud McCranie_, Nov 02 2020