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 A028568 #19 Jun 24 2023 10:32:47
%S A028568 0,9,33,4884,8448,9009,31313,48384,52425,82928,88788,489984,505505,
%T A028568 861168,5013105,8020208,48999984,88322388,801909108,902101209,
%U A028568 3305445033,4899999984,8807447088,35565056553,52065656025,58129692185,80532223508,88892229888,357468864753
%N A028568 Palindromes of the form k*(k+8).
%C A028568 For i >= 0, 48(99)^{2*i}84 is a term arising from k = 69^i6, where ^ is repeated concatenation. - _Michael S. Branicky_, Jan 30 2022
%H A028568 Michael S. Branicky, <a href="/A028568/b028568.txt">Table of n, a(n) for n = 1..58</a>
%H A028568 Patrick De Geest, <a href="http://www.worldofnumbers.com/consemor.htm">Palindromic Quasipronics of the form n(n+x)</a>
%F A028568 a(n) = A028567(n) * (A028567(n) + 8). - _Michael S. Branicky_, Jan 30 2022
%t A028568 Select[Table[k(k+8),{k,0,600000}],PalindromeQ] (* _Harvey P. Dale_, Jun 24 2023 *)
%Y A028568 Intersection of A002113 and A028566.
%Y A028568 Cf. A028567.
%K A028568 nonn,base
%O A028568 1,2
%A A028568 _Patrick De Geest_
%E A028568 a(26) and beyond from _Michael S. Branicky_, Jan 30 2022