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 A288738 #15 Jan 08 2021 08:53:32 %S A288738 1,1,1,2,1,2,1,3,2,1,3,1,1,4,3,2,1,5,1,2,2,2,5,1,6,3,2,2,7,1,1,4,3,3, %T A288738 2,7,1,9,1,4,3,3,3,9,1,2,1,7,4,5,1,3,8,2,2,13,1,2,5,5,5,1,6,2,12,2,3, %U A288738 2,12,5,2,7,3,1,1,6,10,4,3,17,2,3,2,7,10,7 %N A288738 Number of ways writing the n-th 7-smooth number as a product of decimal digits of some other number which has no digits equal to 1. %C A288738 This sequence is A067734 without the zeros. %H A288738 David A. Corneth, <a href="/A288738/b288738.txt">Table of n, a(n) for n = 1..10000</a> %Y A288738 Cf. A002473, A007602, A067734. %K A288738 nonn,base %O A288738 1,4 %A A288738 _David A. Corneth_, Jun 22 2017