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 A027712 #14 Aug 11 2024 14:41:29
%S A027712 0,1,2,4,6,14,15,21,50,92,201,203,292,479,897,1424,1530,1654,2001,
%T A027712 2106,2183,16780,20001,20993,28377,89777,200001,219083,501474,1620660,
%U A027712 1651754,2000001,14842995,17101809,20000001,21147906,21855108,22012038,29287052
%N A027712 Numbers k such that k^2+k+2 is a palindrome.
%H A027712 Giovanni Resta, <a href="/A027712/b027712.txt">Table of n, a(n) for n = 1..65</a>
%H A027712 P. De Geest, <a href="https://www.worldofnumbers.com/quasimor.htm">Palindromic Quasi_Over_Squares of the form n^2+(n+X)</a>
%t A027712 palQ[n_] := Block[{d = IntegerDigits[n]}, d == Reverse[d]]; f[n_] := n^2 + n + 2; Select[Range[0, 10^5], palQ@ f@ # &] (* _Giovanni Resta_, Aug 29 2018 *)
%Y A027712 Cf. A027713, A014206, A028413, A027714.
%K A027712 nonn,base
%O A027712 1,3
%A A027712 _Patrick De Geest_
%E A027712 More terms from _Giovanni Resta_, Aug 28 2018