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 A100080 #17 Feb 07 2024 09:01:40
%S A100080 5,2,26,1,29,19,9,13,3,6,297,64,50,385,45,18,116,65,2,41,393,102,85,
%T A100080 125,35,93,26,86,32,43,4,1,92,58,59,69,126,12,165,151,36,717,437,196,
%U A100080 226,29,60,160,46,55,30,112,25,19,108,90,105,134,123,70,88,9,446,149,236,511
%N A100080 Position of first occurrence of n after the decimal point in the decimal expansion of 1/Pi.
%C A100080 a(0) = A133268(1),
%C A100080 a(1) = A134251(1),
%C A100080 a(2) = A134252(1),
%C A100080 a(3) = A134253(1),
%C A100080 a(4) = A134254(1),
%C A100080 a(5) = A134255(1),
%C A100080 a(6) = A134256(1),
%C A100080 a(7) = A134257(1),
%C A100080 a(8) = A134258(1),
%C A100080 a(9) = A134259(1),
%C A100080 a(10) = A134260(1). - _Artur Jasinski_, Oct 16 2007
%e A100080 1/Pi = 0.31830988618379067153776752674... so the first occurrence of 0 after the decimal point is at position 5; first occurrence of 1 is at position 2; first occurrence of 2 is at position 26; etc.
%t A100080 Table[ SequencePosition[#, IntegerDigits@ n][[1, 1]], {n, 0, 65}] &@ First@ RealDigits@ N[1/Pi, 10^4] (* _James C. McMahon_, Feb 06 2024 *)
%Y A100080 Cf. A032445 and A014777 for Pi, A078197 for e. Digits of 1/Pi=A049541.
%Y A100080 Cf. A037000, A014777, A133268, A134251, A134252, A134253, A134254, A134255, A134256, A134257, A134258, A134259, A134260.
%K A100080 base,easy,nonn
%O A100080 0,1
%A A100080 Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 03 2004
%E A100080 Edited by _N. J. A. Sloane_, Jun 30 2008 at the suggestion of _R. J. Mathar_