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 A082945 #10 Jan 09 2020 14:23:59 %S A082945 111,212,313,414,515,616,717,818,919,11111,22122,33133,44144,55155, %T A082945 66166,77177,88188,99199,1011101,1111111,1211121,1311131,1411141, %U A082945 1511151,1611161,1711171,1811181,1911191,2021202,2121212,2221222,2321232,2421242 %N A082945 Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j. %C A082945 The number i should not end in 0, and m should not equal 0. %C A082945 Suggested by _Amarnath Murthy_. %C A082945 Either i and j are identical palindromes and m is 1, or i is in A031877, j is the corresponding term in A008919, and m is either 4 or 9. - _Charlie Neder_, Mar 08 2019 %H A082945 Chai Wah Wu, <a href="/A082945/b082945.txt">Table of n, a(n) for n = 1..10000</a> %e A082945 rev(8712) = 2178 and 8712 = 2178*4, so 871242178 is in this sequence. - _Charlie Neder_, Mar 08 2019 %Y A082945 Cf. A002113, A008919, A031877. (Possible values of i and j) %K A082945 nonn,base %O A082945 1,1 %A A082945 Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 07 2003 %E A082945 Edited by _N. J. A. Sloane_, Oct 25 2009, following discussions on the Sequence Fans Mailing List, circa Apr 17 2009 %E A082945 Corrected and extended by _Charlie Neder_, Mar 08 2019