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 A068972 #6 Oct 13 2019 22:25:40 %S A068972 2,11,13,7,11,13,259,2,48,1001,9901,999001,101,9901,999001,999001, %T A068972 999999000001,100000042609376 %N A068972 Multipliers resulting from A068665. %Y A068972 Cf. A068664, A068666, A068667, A068971, A068973, A068974. %K A068972 nonn,base,more,hard %O A068972 1,1 %A A068972 _Patrick De Geest_, Mar 30 2002 %E A068972 a(17)-a(18) from _Giovanni Resta_, Sep 25 2019