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 A083405 #17 Aug 01 2019 01:14:34 %S A083405 12494209,448583733,494167063,547084993,851529915,1191394449, %T A083405 1213031209,1338416599,1343524977,1464607989,2064820905,34509780333, %U A083405 36738861453,38016529663,39118059873,40127419683,42087533593,43093084603,43754503723,43948961613 %N A083405 Odd numbers which can be expressed as the product of a number and its reversal in at least two different ways. %D A083405 S. S. Gupta, EPRNs, Science Today, Feb. 1987, India. %H A083405 Hans Havermann, <a href="/A083405/b083405.txt">Table of n, a(n) for n = 1..343</a> %H A083405 Shyam Sunder Gupta, <a href="http://www.shyamsundergupta.com/eporns.htm">EPRN Numbers</a>. %e A083405 12494209 = 13143 * 34131 = 31341 * 14313, 1191394449 = 12369 * 96321 = 30783 * 38707, etc. %Y A083405 Cf. A066531. %K A083405 nonn,base %O A083405 1,1 %A A083405 _Shyam Sunder Gupta_, Jun 07 2003 %E A083405 More terms from _Hans Havermann_, Feb 11 2012 %E A083405 Definition corrected by _N. J. A. Sloane_, Aug 01 2019