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 A001948 #23 Oct 03 2017 03:59:04
%S A001948 1,2,3,5,6,7,9,10,11,13,15,17,18,19,22,23,25,27,31,33,34,37,43,47,55,
%T A001948 58,67,73,82,97,103
%N A001948 These numbers when multiplied by all powers of 4 give the numbers that are not the sums of 4 distinct squares.
%C A001948 See also the comment in sequence A004437: The only integers that cannot be partitioned into a sum of four distinct squares of nonnegative integers are 4^k x (A union B) where A = {1,3,5,7,9,11,13,15,17,19,23,25,27,31,33,37,43,47,55,67,73,97,103} and B = {2,6,10,18,22,34,58,82}. - _M. F. Hasler_, Jun 11 2014
%H A001948 Gordon Pall, <a href="http://www.jstor.org/stable/2301257">On Sums of Squares</a>, The American Mathematical Monthly, Vol. 40, No. 1, (January 1933), pp. 10-18.
%H A001948 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%Y A001948 Cf. A001944, A004437.
%K A001948 nonn,fini,full
%O A001948 1,2
%A A001948 _N. J. A. Sloane_, _Dan Hoey_