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 A101815 #15 Mar 26 2025 11:30:14 %S A101815 17387594880,26852899245,30243957439,34549153953,41952536161, %T A101815 43289964000 %N A101815 Positions in the decimal places of Pi where the string of digits 0123456789 appears. %H A101815 Jonathan Borwein, <a href="https://web.archive.org/web/20220127182534/https://www.cecm.sfu.ca/~jborwein/brouwer.html">The Brouwer-Heyting Sequence</a> %H A101815 Shyam Sunder Gupta, <a href="https://doi.org/10.1007/978-981-97-2465-9_19">Mystery of pi</a>, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 19, 473-497. %H A101815 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits</a>. %H A101815 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a> %e A101815 The string 0123456789 does not appear in the decimal places of Pi before the set of 10 digits beginning at position 17387594880. %Y A101815 Cf. A101816 for positions of 9876543210 in Pi decimal places. %K A101815 base,hard,more,nonn %O A101815 0,1 %A A101815 Mark Hudson (mrmarkhudson(AT)hotmail.com), Dec 17 2004