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 A096306 #3 Dec 15 2017 17:36:43 %S A096306 0,0,18,0,19,17,16,0,15,18,17,16,1,15,2,0,1,14,1,1,15,0,14,0,3,13,3,0, %T A096306 2,2,3,12,1,2,11,0,10,1,9,10,69,0,9,9,68,0,8,8,66,67,8,0,66,7,66,7,0, %U A096306 65,6,65,62,6,63,0,63,64,61,5,62,0,62,63,63,60,4,4,0,61,62,62,59,3,3,0,2,60 %N A096306 Number of iterations of n -> n + (largest digit of n) needed for the trajectory of n to join the trajectory of A045844. %C A096306 Conjecture: For any positive integer starting value n, iterations of n -> n + (largest digit of n) will eventually join A045844. %e A096306 a(25)=3 because the trajectory for 1 (sequence A045844) starts %e A096306 1->2->4->8->16->22->24->28->36->42->46... %e A096306 and the trajectory for 25 starts %e A096306 25->30->33->36->42->46->52->57... %e A096306 so the sequence beginning with 25 joins A045844 after 3 steps. %K A096306 base,nonn %O A096306 1,3 %A A096306 _Jason Earls_, Jun 26 2004