cp's OEIS Frontend

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.

A294308 Integers with precisely seven partitions into sums of four squares of nonnegative numbers.

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%I A294308 #12 Oct 29 2017 13:07:44
%S A294308 82,98,100,102,106,108,118,125,129,132,133,134,135,161,163,173,183,
%T A294308 197,199,204,211,212,215,236,263,328,392,400,408,424,432,472,528,536,
%U A294308 816,848,944,1312,1568,1600,1632,1696,1728,1888,2112,2144,3264,3392,3776
%N A294308 Integers with precisely seven partitions into sums of four squares of nonnegative numbers.
%C A294308 A002635(a(n)) = 7.
%H A294308 Robert Price, <a href="/A294308/b294308.txt">Table of n, a(n) for n = 1..74</a>
%H A294308 D. H. Lehmer, <a href="http://www.jstor.org/stable/2305380">On the Partition of Numbers into Squares</a>, The American Mathematical Monthly, Vol. 55, No. 8, October 1948, pp. 476-481.
%H A294308 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%t A294308 f[n_]:=Length@PowersRepresentations[n, 4, 2]; Select[Range@650, f@#==7 &] (* _Vincenzo Librandi_, Oct 28 2017 *)
%Y A294308 Cf. A001156, A002635, A006431, A025428, A180149, A245022, A294282, A294297, A293175.
%K A294308 nonn
%O A294308 1,1
%A A294308 _Robert Price_, Oct 27 2017