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 A335650 #28 Jul 08 2020 14:24:24 %S A335650 2,3,4,5,7,8,9,16,22,25,26,27,32,33,34,38,39,44,46,49,51,52,55,57,58, %T A335650 62,64,65,68,69,74,76,77,81,82,85,86,87,88,91,92,93,94,95,99,104,106, %U A335650 111,115,116,117,118,119,122,123,124,125,128,129,133,134,136,141,142 %N A335650 Numbers that are multiples of 2,3,5, or 7 but not multiples of the product of any combination of 2,3,5, and 7. %e A335650 4 is a term because 4 = 2 * 2; %e A335650 77 is a term because 77 = 7 * 11; %e A335650 6 is not a term because 6 = 2 * 3; %e A335650 21 is not a term because 21 = 3 * 7; %e A335650 30 is not a term because 30 = 2 * 3 * 5; %e A335650 210 is not a term because 210 = 2 * 3 * 5 * 7. %p A335650 q:= n-> is(igcd(n, 210) in {2,3,5,7}): %p A335650 select(q, [$0..200])[]; # _Alois P. Heinz_, Jun 16 2020 %t A335650 Select[Range[150], Count[IntegerExponent[#, {2, 3, 5, 7}], 0] == 3 &] (* _Amiram Eldar_, Jun 16 2020 *) %o A335650 (Haskell) a335650 = [x | x <- [0..], (gcd x 210) `elem` [2,3,5,7]] %Y A335650 Cf. A126590. %K A335650 nonn %O A335650 1,1 %A A335650 _Peter Andrew_, Jun 15 2020