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 A171742 #9 Jul 24 2015 03:34:31 %S A171742 24,300,30222192,4838419019 %N A171742 First 4-fold intrinsically n-palindrome (given in base ten). %C A171742 Given the size of the first 3-fold 6-palindrome (13 base-ten digits; see A171705 or A171741), a fifth term is going to be difficult. %e A171742 a(2)=24 is 11 in base 23, 22 in base 11, 33 in base 7 and 44 in base 5. %e A171742 a(3)=300 is 1A1 in base 13, 363 in base 9, 454 in base 8 and 606 in base 7. %Y A171742 Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741. %K A171742 more,hard,nonn,base %O A171742 2,1 %A A171742 _James G. Merickel_, Dec 17 2009