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 A256160 #24 Apr 08 2020 00:24:50
%S A256160 6,46,2952,17992,19451,768,1722783,36356650,564665215,20148132320,
%T A256160 27014073315,897831316568,10542036048463,5758910552723
%N A256160 Index of the n-th 9 in the first occurrence of a string of exactly n 9's in the decimal expansion of Pi.
%C A256160 A048940 is 5, 44, 762, 762, 762, 762, 1722776, 36356642, 564665206, ... - _Alonso del Arte_, Mar 25 2015
%H A256160 Dave Andersen, <a href="http://www.angio.net/pi/">The Pi-Search Page</a>.
%F A256160 a(n) = A096763(n) + n. - _Danny Rorabaugh_, Mar 31 2015
%o A256160 (PARI) { default(realprecision, 20080); for (m = 1, 10, x = Pi; r = 0; for (n = 1, 20000, d = floor(x); x = (x-d)*10; if(d <> 9, if (r <> m, r = 0, print1(n-1, ", "); r = 0; break), r = r + 1)))}
%Y A256160 Cf. A048940, A096763, A256109.
%K A256160 nonn,base,more
%O A256160 1,1
%A A256160 _Kival Ngaokrajang_, Mar 16 2015
%E A256160 a(10)-a(14) added using A096763 by _Jinyuan Wang_, Mar 30 2020