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 A328089 #5 Oct 17 2019 20:32:18 %S A328089 81,8241,9801,538276,998001,77837025,99980001,7922547264,8643251344, %T A328089 9223797609,9999800001,106710893289,453378226756,491023832064, %U A328089 945958034529,999998000001,11916002265169,15790977390244,24917378001936,25082758752025,36315251812569 %N A328089 Numbers k such that k+1 concatenated with k is a square. %D A328089 Luca, Florian, and Pantelimon Stănică. "Perfect Squares as Concatenation of Consecutive Integers." The American Mathematical Monthly 126.8 (2019): 728-734. %Y A328089 A companion to A054214, A054215, A054216. %K A328089 nonn,base %O A328089 1,1 %A A328089 _N. J. A. Sloane_, Oct 17 2019