%I #14 Apr 27 2017 10:11:16
%S 1,-1,0,0,-4,4,0,-7,13,-6,-10,38,-32,-9,74,-103,27,137,-266,153,191,
%T -593,537,167,-1161,1437,-222,-2035,3397,-1578,-3110,7160,-5285,-3712,
%U 13942,-13920,-2002,24848,-32241,6764,40661,-68059,32487,59109,-133506,95221,71243
%N Expansion of Product_{k>=0} (1-x^(3*k+1))^(3*k+1).
%H Seiichi Manyama, <a href="/A285050/b285050.txt">Table of n, a(n) for n = 0..10000</a>
%Y Product_{k>=0} (1-x^(m*k+1))^(m*k+1): A285069 (m=2), this sequence (m=3), A285070 (m=4), A285071 (m=5).
%Y Cf. A262947.
%K sign
%O 0,5
%A _Seiichi Manyama_, Apr 15 2017