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 A113624 #10 Sep 17 2024 14:49:33 %S A113624 4,6,8,9,40,48,49,60,64,80,84,90,96,98,400,448,480,486,490,600,640, %T A113624 648,686,800,840,864,896,900,960,980,4000,4096,4480,4608,4800,4860, %U A113624 4900,6000,6048,6400,6480,6804,6860,8000,8064,8400,8640,8960,9000,9408,9600 %N A113624 7-smooth numbers containing only composite digits (0,4,6,8,9). %e A113624 96 is a term as 96 = 2^5*3 and contains digits 9,6 both composite. 96 is a member of A002473. %t A113624 Select[Select[Range[2, 10000], FactorInteger[ # ][[ -1]][[1]] <= 7 &], DigitCount[ # ][[1]]+DigitCount[ # ][[2]]+DigitCount[ # ][[3]]+DigitCount[ # ][[5]]+ DigitCount[ # ][[7]] == 0 &] (* _Stefan Steinerberger_, Apr 11 2006 *) %Y A113624 Intersection of A001744 and A002473. %Y A113624 Cf. A113623. %K A113624 base,nonn %O A113624 1,1 %A A113624 _Amarnath Murthy_, Nov 10 2005 %E A113624 More terms from _Stefan Steinerberger_, Apr 11 2006 %E A113624 Name corrected and offset changed by _Andrew Howroyd_, Sep 17 2024