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 A060088 #7 Aug 11 2024 14:41:33 %S A060088 1230127210321,12120030703002121,12341234943214321, %T A060088 102210100272001012201,102230523292325032201,121020021070120020121, %U A060088 121240161292161042121,123230205292502032321,1020300010207020100030201 %N A060088 Palindromic squares with an asymmetric square root. %C A060088 With 'asymmetric' is meant almost palindromic with a 'core' (pseudo-palindromic). The core '09' when transformed into '1n' (n=-1) makes the base number palindromic. E.g., 1109111 is in fact 11_09_111 -> 11_(10-1)_111 -> 11_1n_111 -> 111n111 and palindromic. Similarly core 099 becomes 10n, core 0999 becomes 100n, etc. %D A060088 M. Keith, "Classification and Enumeration of Palindromic Squares," Journal of Recreational Mathematics, 22:2, pp. 124-132, 1990. %H A060088 P. De Geest, <a href="https://www.worldofnumbers.com/subsquar.htm">Subsets of Palindromic Squares</a> %Y A060088 Cf. A060087, A007573, A059744, A059745. %K A060088 nonn,base %O A060088 1,1 %A A060088 _Patrick De Geest_, Feb 15 2001