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 A258265 #10 Jun 16 2015 14:06:32
%S A258265 16,17,19,23,26,31,32,33,35,40,41,42,44,46,47,51,52,54,56,59,62,63,68,
%T A258265 71,72,74,75,76,77,80,81,82,85,86,89,94,95,96,98,103,104,106,107,109,
%U A258265 111,113,116,117,118,121,122,123,124,125,126,128,129,131,133,134
%N A258265 Numbers having more than one representation as a sum of the minimal number of triangular numbers, A000217.
%C A258265 A258257(a(n)) > 1.
%C A258265 Complement of A258264.
%H A258265 Giovanni Resta, <a href="/A258265/b258265.txt">Table of n, a(n) for n = 1..10000</a>
%t A258265 t[n_] := n*(n + 1)/2; ok[n_] := Block[{k = 1, t, tt = t /@ Range[Sqrt[2*n]]}, While[{} == (r = IntegerPartitions[n, {k}, tt]), k++]; 1 < Length@r]; Select[ Range@ 1000, ok] (* _Giovanni Resta_, Jun 09 2015 *)
%Y A258265 Cf. A258257, A258264.
%K A258265 nonn
%O A258265 1,1
%A A258265 _Martin Renner_, May 25 2015