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 A062863 #10 Nov 21 2013 12:47:31
%S A062863 3,7,8,11,12,17,18,20,21,22,23,24,26,27,32,33,34,37,38,39,40,42,43,45,
%T A062863 46,47,48,51,52,53,57,58,59,62,63,65,66,67,68,70,71,72,73,74,75,76,78,
%U A062863 79,80,82,83,84,87,88,89,93,94,95,97,98,99,101,102,103,104,106,107,108
%N A062863 Numbers which cannot be written as sums of squares of consecutive numbers (even allowing squares of negative numbers).
%H A062863 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%t A062863 Complement[Range[150],Union[Flatten[Table[Union[Total/@(Partition[ Range[-50,50],i,1]^2)],{i,20}]]]] (* _Harvey P. Dale_, Jan 04 2012 *)
%Y A062863 Complement of A062861. Cf. A062862.
%K A062863 nonn
%O A062863 0,1
%A A062863 _Henry Bottomley_, Jun 25 2001