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 A118938 #8 Aug 22 2013 03:13:55 %S A118938 78,287,364,1096,18183,336634,2727274,19138757,23529412,25974026, %T A118938 97744361,120879122,140017878,165991904,237762239,288553552,307692308, %U A118938 333666334,405436669,428571430,440553516,447710186,454545455,473684212 %N A118938 Sub-Kaprekar numbers (2): n such that n=r-q and n^2=q*10^m+r, for some m>=1, q>=0, 0<=r<10^m, with n not a power of 10. %H A118938 Hans Havermann, <a href="/A118938/b118938.txt">Table of n, a(n) for n = 1..1000</a> %H A118938 Hans Havermann, <a href="http://chesswanks.com/seq/a118938.txt">A large number of terms pairing them with the their A118937 partners.</a> %e A118938 287^2 = 82369 and 369-82 = 287. %e A118938 A larger example is 1980198021^2 = 3921184202372316441, and 2372316441-392118420 = 1980198021. %Y A118938 Cf. A006886, A118936, A118937, A228381. %K A118938 base,nonn %O A118938 1,1 %A A118938 _Giovanni Resta_, May 06 2006