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 A078337 #12 Jun 27 2025 00:54:33
%S A078337 4,6,8,9,22,33,44,55,66,77,88,99,121,202,222,242,262,282,303,333,363,
%T A078337 393,404,424,444,464,484,505,555,606,616,626,636,646,666,686,696,707,
%U A078337 777,808,828,848,868,888,909,939,969,999,1111,1221,1331,1441,1551,1661
%N A078337 Palindromes which are a nontrivial product of 2 palindromes (which need not be distinct).
%H A078337 Giovanni Resta, <a href="/A078337/b078337.txt">Table of n, a(n) for n = 1..10000</a>
%t A078337 palQ[n_] := Reverse[x = IntegerDigits[n]] == x; t1 = Rest[Select[Range[1670], palQ[#] &]]; Intersection[t1, Union[Flatten[Table[i*j, {i, t1}, {j, t1}]]]] (* _Jayanta Basu_, Jun 15 2013 *)
%Y A078337 Cf. A002113, A078895.
%K A078337 base,nonn,easy
%O A078337 1,1
%A A078337 _Amarnath Murthy_, Jun 07 2002
%E A078337 Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003