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 A068897 #7 Sep 19 2024 21:42:32
%S A068897 5041,108900,122500,128164,137641,155236,173056,185761,203401,206116,
%T A068897 216225,287296,288369,302500,324900,342225,368449,423801,434281,
%U A068897 459684,485809,515524,531441,540225,675684,698896,720801,737881,749956,779689
%N A068897 Squares containing 2k digits in which the sum of the first k digits = that of the rest.
%H A068897 Andrew Howroyd, <a href="/A068897/b068897.txt">Table of n, a(n) for n = 1..10000</a>
%e A068897 5041 is a member with 5+0 = 4+1.
%o A068897 (PARI) isok(n)={my(d=digits(n)); my(k=#d); k%2==0 && vecsum(d[1..k/2]) == vecsum(d[k/2+1..k])}
%o A068897 lista(n)={my(L=List(), k=0); while(#L<n, k++; my(t=k^2); if(isok(t), listput(L,t))); Vec(L)} \\ _Andrew Howroyd_, Sep 19 2024
%Y A068897 Intersection of A000290 and A240927.
%Y A068897 Cf. A068896, A068898.
%K A068897 easy,nonn,base
%O A068897 1,1
%A A068897 _Amarnath Murthy_, Mar 21 2002
%E A068897 Corrected and extended by _Harvey P. Dale_, Mar 31 2002
%E A068897 Offset changed by _Andrew Howroyd_, Sep 19 2024