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 A050284 #24 Feb 16 2025 08:32:40 %S A050284 4,130,177,24466,24466,244453,3517236,168743355,5050944965,7644991298, %T A050284 157675736216,1618922020656,7604259624808,7604259624808 %N A050284 a(n) is the starting position of the first occurrence of a string of (at least) n '5's in the decimal expansion of Pi. %C A050284 This sequence has a(4) = a(5) = A096759(5) < A096759(4). As can be seen from a(1) = 4 (referring to the '5' in 3.1415...), position p means the string starts at the p-th digit after the decimal point. - _M. F. Hasler_, Apr 13 2019 %C A050284 a(11) > 99*10^9. - _Giovanni Resta_, Oct 02 2019 %C A050284 a(15) > 22*10^12. - _Dmitry Petukhov_, Jan 29 2020 %H A050284 Peter Trüb, <a href="https://pi2e.ch/blog/2017/03/10/pi-digits-download/">22.4 trillion digits of pi</a> %H A050284 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a> %Y A050284 Cf. A096759 (variant), ...A050283, A050285... (analog for digits ..., 4, 6, ...). %K A050284 nonn,base,more %O A050284 1,1 %A A050284 _Eric W. Weisstein_ %E A050284 More terms from Colin Martin (cbmartin(AT)tpg.com.au), Mar 03 2002 %E A050284 Typo in a(10) corrected by _Giovanni Resta_, Oct 02 2019 %E A050284 a(11)-a(14) added by _Dmitry Petukhov_, Jan 12 2020