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 A272673 #12 May 21 2016 13:38:23 %S A272673 0,6,0,21,44,69,96,24,89,156,225,296,369,444,521,600,681,764,849,936, %T A272673 0,201,404,609,816,1025,1236,1449,1664,1881,2100,2321,2544,2769,2996, %U A272673 3225,3456,3689,3924,4161,4400,4641,4884,5129,5376,5625,5876 %N A272673 Take list of squares that start with 1 (A045784) and omit the leading 1 and any leading zeros from what is left; if the number was a power of 10, replace it with 0. %H A272673 Chai Wah Wu, <a href="/A272673/b272673.txt">Table of n, a(n) for n = 1..10000</a> %o A272673 (Python) %o A272673 A272673_list = [0] + [int(str(m**2)[1:]) if sum(int(d) for d in str(m**2)[1:]) != 1 else 0 for m in range(4,10**3) if str(m**2)[0] == '1'] # _Chai Wah Wu_, May 21 2016 %Y A272673 Cf. A045784, A045855. %K A272673 nonn,base %O A272673 1,2 %A A272673 _Nathan Fox_, _Brooke Logan_, and _N. J. A. Sloane_, May 21 2016