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 A045639 #35 Jul 07 2025 04:03:32
%S A045639 0,4,8,44,88,212,232,252,272,292,404,424,444,464,484,616,636,656,676,
%T A045639 696,808,828,848,868,888,2112,2332,2552,2772,2992,4004,4224,4444,4664,
%U A045639 4884,6116,6336,6556,6776,6996,8008,8228,8448,8668,8888,21012,21112,21212
%N A045639 Palindromic and divisible by 4.
%H A045639 Paolo Xausa, <a href="/A045639/b045639.txt">Table of n, a(n) for n = 1..3000</a>
%t A045639 palQ[n_]:=Module[{idn=IntegerDigits[n]},idn==Reverse[idn]]; Select[4*Range[0, 6000],palQ] (* _Harvey P. Dale_, Jan 30 2011 *)
%Y A045639 Intersection of A002113 and A008586.
%Y A045639 Cf. A029951, A045638, A043040, A045641, A045642, A045643, A045644, A083852.
%K A045639 nonn,base
%O A045639 1,2
%A A045639 _Jeff Burch_
%E A045639 Edited to include a(1) = 0 by _Paolo Xausa_, Jul 07 2025