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 A134257 #9 Mar 21 2020 07:21:37 %S A134257 13,17,21,22,24,28,34,54,66,67,80,87,98,119,121,135,139,155,161,167, %T A134257 184,194,195,199,202,208,217,220,228,238,262,266,273,281,287,290,296, %U A134257 300,318,326,334,356,369,374,376,383,395,396,400,404,408,414,415,430,434 %N A134257 Positions of 7 after decimal point in decimal expansion of 1/Pi. %H A134257 Amiram Eldar, <a href="/A134257/b134257.txt">Table of n, a(n) for n = 1..10000</a> %t A134257 Flatten @ Position[RealDigits[1/Pi, 10, 500][[1]], 7] (* _Amiram Eldar_, Mar 21 2020 *) %Y A134257 Cf. A037000, A014777, A134251, A134252, A134253, A134254, A134255, A134256, A134258, A134259, A134260. %K A134257 nonn,base %O A134257 1,1 %A A134257 _Artur Jasinski_, Oct 16 2007