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 A032752 #16 Feb 16 2025 08:32:36
%S A032752 83338,1142411,1571751,1587851,2013102,2081802,2541452,3278723,
%T A032752 3394933,3433343,3863683,4684864,5067605,5516155,5985895,6148416,
%U A032752 6467646,6771776,6912196,7043407,7136317,7304037,7417147,7605067,7987897
%N A032752 Palindromic Super-4 Numbers.
%D A032752 C. A. Pickover, "Keys to Infinity", New York: Wiley, p. 7, 1995.
%H A032752 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Super-dNumber.html">Super-d Number</a>.
%t A032752 Select[Range[80*10^5],PalindromeQ[#]&&SequenceCount[IntegerDigits[4#^4],{4,4,4,4}]>0&] (* _Harvey P. Dale_, Jan 18 2023 *)
%Y A032752 Cf. A014569, A032744.
%K A032752 nonn,base
%O A032752 1,1
%A A032752 _Patrick De Geest_, May 15 1998