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 A086862 #10 Oct 04 2023 12:19:48 %S A086862 1,1,1,1,1,1,1,1,1,2,11,11,11,11,11,11,11,11,2,10,10,10,10,10,10,10, %T A086862 10,10,11,10,10,10,10,10,10,10,10,10,11,10,10,10,10,10,10,10,10,10,11, %U A086862 10,10,10,10,10,10,10,10,10,11,10,10,10,10,10,10,10,10,10,11,10,10,10,10,10 %N A086862 Differences between successive palindromes. %H A086862 Reinhard Zumkeller, <a href="/A086862/b086862.txt">Table of n, a(n) for n = 1..10000</a> %F A086862 a(n) = A002113(n+1) - A002113(n). - _Michel Marcus_, Jun 30 2014 %e A086862 The first 10 palindromes are 0, 1, ..., 9 yielding 9 ones for the first terms of this sequence. %t A086862 Differences[Select[Range[0,1000],PalindromeQ]] (* _Harvey P. Dale_, Oct 04 2023 *) %o A086862 (Haskell) %o A086862 a086862 n = a086862_list !! (n-1) %o A086862 a086862_list = zipWith (-) (tail a002113_list) a002113_list %o A086862 -- _Reinhard Zumkeller_, Jul 30 2015 %Y A086862 Cf. A002113. %K A086862 nonn,base %O A086862 1,10 %A A086862 Karl Goiser (kggoiser(AT)utas.edu.au), Aug 20 2003 %E A086862 One additional 1 prepended by _Michel Marcus_, Jun 30 2014