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 A134253 #11 Mar 21 2020 07:21:18 %S A134253 1,4,12,20,58,59,69,78,92,111,120,126,136,143,150,151,164,165,186,193, %T A134253 197,206,211,213,214,225,234,247,254,261,267,271,288,319,342,352,353, %U A134253 354,364,370,373,378,384,386,387,416,421,436,439,449,452,455,457,462 %N A134253 Positions of 3 after decimal point in decimal expansion of 1/Pi. %H A134253 Amiram Eldar, <a href="/A134253/b134253.txt">Table of n, a(n) for n = 1..10000</a> %t A134253 Flatten[Position[RealDigits[1/Pi,10,500][[1]],3]] (* _Harvey P. Dale_, Sep 18 2013 *) %Y A134253 Cf. A037000, A014777, A134251, A134252, A134254, A134255, A134256, A134257, A134258, A134259, A134260. %K A134253 nonn,base %O A134253 1,2 %A A134253 _Artur Jasinski_, Oct 16 2007