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 A074901 #6 Jun 04 2021 03:16:14 %S A074901 0,2,4,6,8,9,12,26,27,34,38,48,54,60,96,150,168,180,420,438,462,468, %T A074901 522,540,570,828,1320,1782,2130,2142,2280,2370,2448,2700,2760,2790, %U A074901 2808,2922,2952,2982,3012,3402,3570,3582,3972,4218,4860,5148 %N A074901 Increasingly larger bases required for composite numbers to become prime by base reversal (A075243). %Y A074901 Cf. A075243. %K A074901 nonn,base,hard,more %O A074901 1,2 %A A074901 _Robert G. Wilson v_, Sep 16 2002 %E A074901 More terms from _Amiram Eldar_, Jun 04 2021