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Number of different coefficient values in expansion of Product_{i=1..n} (1 + (-q)^i).
1

%I #11 Aug 30 2018 03:03:07

%S 2,2,3,4,6,10,13,17,36,48,33,39,86,100,60,68,148,166,95,105,226,248,

%T 138,150,320,346,189,203,430,460,248,264,556,590,315,333,698,736,390,

%U 410,856,898,473,495,1030,1076,564,588,1220,1270

%N Number of different coefficient values in expansion of Product_{i=1..n} (1 + (-q)^i).

%o (PARI) a(n) = #vecsort(Vec(prod(i = 1, n, (1 + (-q)^i))), , 8) \\ _David A. Corneth_, Aug 29 2018

%Y Cf. A039822, A039828.

%K nonn

%O 1,1

%A _Olivier GĂ©rard_