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 A121476 #13 Oct 19 2024 15:46:10 %S A121476 9,171,252,333,414,10701,11511,12321,13131,20502,21312,22122,30303, %T A121476 31113,40104,1007001,1015101,1023201,1031301,1105011,1113111,1121211, %U A121476 1203021,1211121,1301031,2005002,2013102,2021202,2103012,2111112,2201022,3003003,3011103 %N A121476 Palindromes with digit sum 9. %t A121476 Select[Range[3100000],PalindromeQ[#]&&Total[IntegerDigits[#]]==9&] (* _James C. McMahon_, Oct 19 2024 *) %Y A121476 Intersection of A002113 and A052223. %Y A121476 Cf. A121477. %K A121476 base,nonn %O A121476 1,1 %A A121476 _Lekraj Beedassy_, Aug 01 2006 %E A121476 Missing 1301031 and more terms terms from _Sean A. Irvine_, Jun 04 2024