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 A338287 #11 Oct 20 2020 21:32:09 %S A338287 6,5,7,4,3,3,1,1,1,0,1,8,5,3,2,8,1,9,6,7,3,4,5,8,3,1,6,7,6,8,0,8,6,8, %T A338287 4,1,1,6,8,5,3,4,4,1,0,6,6,3,5,3,9,8,1,6,1,0,5,0,4,3,9,2,6,3,4,6,1,3, %U A338287 8,7,3,8,7,3,7,1,8,5,2,6,8,0,3,4,7,8,2 %N A338287 Decimal expansion of the sum of reciprocals of the numbers that are not pandigital numbers (version 2, A171102). %C A338287 The sum of the reciprocals of the terms of the complement of A171102: numbers with at most 9 distinct digits. It is the union of the 10 sequences of numbers without a single given digit (see the Crossrefs section). %C A338287 The terms in the data section were taken from the 200 decimal digits given by Strich and Müller (2020). %H A338287 Robert Strich and Eric Müller, <a href="https://doi.org/10.1007/978-3-662-61166-1_27">Ziffernreduzierte Zahlen</a>, in: E. Specht, E. Quaisser and P. Bauermann (eds.), 50 Jahre Bundeswettbewerb Mathematik, Springer Spektrum, Berlin, Heidelberg, 2020, pp. 171-182. %F A338287 Equals 1/1 + 1/2 + 1/3 + ... + 1/1023456788 + 1/1023456790 + ..., i.e., A171102(1) = 1023456789 is the first number whose reciprocal is not in the sum. %e A338287 65.74331110185328196734583167680868411685344106635398... %Y A338287 Cf. A171102, A179954, A082830, A082831, A082832, A082833, A082834, A082835, A082836, A082837, A082838, A082839. %Y A338287 Cf. A052382 (numbers without the digit 0), A052383 (without 1), A052404 (without 2), A052405 (without 3), A052406 (without 4), A052413 (without 5), A052414 (without 6), A052419 (without 7), A052421 (without 8), A007095 (without 9). %K A338287 nonn,cons,base %O A338287 2,1 %A A338287 _Amiram Eldar_, Oct 20 2020