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 A119887 #6 Aug 12 2025 03:03:59 %S A119887 57735,333334,471405,577350,666667,745356,881917,942809,1054093, %T A119887 1054094,1054095,1054096,1490712,1490713,1490714,1825741,1825742, %U A119887 1825743,2108185,2108186,2357022,2357023,2581988,2581989,2788866,2788867 %N A119887 Numbers whose square starts with 6 identical digits. %e A119887 57735^2=3333330225, 333334^2=111111555556. %t A119887 Select[ Range[ 1000, 5000000 ], Length[ Union[ Take[ IntegerDigits[ #^2 ], 6 ] ] ] == 1 & ] (* _Jonathan Vos Post_, Aug 29 2007 *) %Y A119887 Cf. A119511. %K A119887 nonn,base %O A119887 1,1 %A A119887 _Zak Seidov_, Aug 04 2006