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 A121893 #7 Mar 26 2022 14:42:20 %S A121893 10,14,18,21,22,26,27,28,32,33,34,38,39,40,44,45,46,50,51,52,54,55,57, %T A121893 58,60,62,65,66,68,69,70,74,75,76,77,78,82,84,85,86,87,88,91,92,93,94, %U A121893 95,96,98,102,104,105,106,108,111,112,114,115,116,117,118,119,122 %N A121893 Composite integers not equal to k*[k or k+1 or k+2] where k is a natural number. %Y A121893 Cf. A308874, A000290, A002378, A005563. %K A121893 easy,nonn %O A121893 1,1 %A A121893 _Giovanni Teofilatto_, Sep 01 2006 %E A121893 Incorrect term 80 removed by _Michel Marcus_, Mar 26 2022