A039830 - OEIS

A039830

Number of different coefficient values in expansion of Product_{i=1..n} (1-q^1+q^2-...+(-q)^i).

%I #10 Jan 05 2023 18:29:47

%S 1,2,4,4,6,16,22,15,19,46,56,34,40,92,106,61,69,154,172,96,106,232,

%T 254,139,151,326,352,190,204,436,466,249,265,562,596,316,334,704,742,

%U 391,411,862,904,474,496,1036,1082,565,589,1226,1276,664,690,1432,1486,771

%N Number of different coefficient values in expansion of Product_{i=1..n} (1-q^1+q^2-...+(-q)^i).

%H Seiichi Manyama, <a href="/A039830/b039830.txt">Table of n, a(n) for n = 0..200</a>

%Y Cf. A039823, A039909.

%K nonn

%O 0,2

%A _Olivier Gérard_

%E a(0)=1 prepended by _Seiichi Manyama_, Jan 05 2023