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 A256352 #11 Apr 09 2024 15:58:23 %S A256352 10,33,39,133,183,185,203,235,291,295,303,325,343,381,391,451,475,517, %T A256352 535,539,561,583,655,703,723,753,775,791,799,841,867,889,895,943,1003, %U A256352 1023,1083,1099,1121,1159,1165,1173,1186,1198,1207,1219,1263,1333,1366 %N A256352 Composites in base 10 that remain composite in exactly six bases b, 2 <= b <= 10, expansions interpreted as decimal numbers. %H A256352 Sebastian Petzelberger, <a href="/A256352/b256352.txt">Table of n, a(n) for n = 1..10000</a> %H A256352 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_024.htm">PP&P Puzzle 24: Primes in several bases</a> %Y A256352 Cf. A052026, A256350-A256356, A038537, A052027-A052033, A084482, A236356. %K A256352 nonn,base %O A256352 1,1 %A A256352 _Sebastian Petzelberger_, Mar 25 2015