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 A035135 #24 Feb 16 2025 08:32:37 %S A035135 4,6,9,22,33,44,55,66,77,99,111,121,141,161,171,202,212,222,242,252, %T A035135 262,282,292,303,323,333,363,393,404,414,434,444,454,474,484,494,505, %U A035135 515,525,535,545,555,565,575,585,595,606,626,636,646,666,676,707,717 %N A035135 Cubefree composite palindromes. %H A035135 Amiram Eldar, <a href="/A035135/b035135.txt">Table of n, a(n) for n = 1..10000</a> %H A035135 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Cubefree.html">Cubefree</a>. %t A035135 cufQ[n_]:=Max[Transpose[FactorInteger[n]][[2]]]<=2; palQ[n_]:=FromDigits[Reverse[IntegerDigits[n]]]==n; Select[Range[2,718],!PrimeQ[#] && cufQ[#] && palQ[#] &] (* _Jayanta Basu_, May 12 2013 *) %Y A035135 Intersection of A002113, A002808 and A004709. %Y A035135 Cf. A035133, A035134. %K A035135 nonn,base %O A035135 1,1 %A A035135 _Patrick De Geest_, Nov 15 1998