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 A096347 #12 Dec 15 2017 17:36:44 %S A096347 1,2,12,102,116,1098,2072,1014,101134,11014,1011098,1003525,41021255, %T A096347 210110985,403130555,481104655,4401225555,4811125555,86413249555, %U A096347 39011218055 %N A096347 Least number with n preimages (or immediate predecessors) under f(n) = n + (product of nonzero digits of n). %C A096347 First occurrence of k in A096972. %C A096347 a(20) > 10^11. [From _Donovan Johnson_, Nov 22 2009] %D A096347 P. A. Loomis, An Introduction to Digit Product Sequences (see link). %H A096347 P. A. Loomis, <a href="http://facstaff.bloomu.edu/ploomis/sequences.html">An Interesting Family of Iterated Sequences</a>. %H A096347 P. A. Loomis, <a href="http://facstaff.bloomu.edu/ploomis/itseq4.ps">An Introduction to Digit Product Sequences</a>, J. Rec. Math., 32 (2003-2004), 147-151. %H A096347 P. A. Loomis, <a href="/A063108/a063108.pdf">An Introduction to Digit Product Sequences</a>, J. Rec. Math., 32 (2003-2004), 147-151. [Annotated archived copy] %H A096347 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %e A096347 a(3)=102 because 102 is the least number with three direct predecessors, 66: 66+6*6 = 102, 74: 74+7*4 = 102, 101: 101+1*1 = 102. %Y A096347 Cf. A096972, A063108, A063425, A096922, A096923, A096924, A096925, A096926, A096927, A096928, A096929, A096930, A096931. %K A096347 base,more,nonn %O A096347 0,2 %A A096347 _Jason Earls_, Jun 29 2004 %E A096347 a(8) to a(11) from _Klaus Brockhaus_, Jul 07 2004 %E A096347 a(12) from _Robert G. Wilson v_, Jul 15 2004 %E A096347 a(13)-a(19) from _Donovan Johnson_, Nov 22 2009