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%I #6 Jun 12 2021 06:38:15
%S 0,-6,-8,0,32,120,336,840,1984,4536,10160,22440,49056,106392,229264,
%T 491400,1048448,2228088,4718448,9961320,20971360,44040024,92274512,
%U 192937800,402652992,838860600,1744830256,3623878440,7516192544,15569256216,32212254480,66571992840
%N a(n) = n * (2^n - 8).
%K sign
%O 0,2
%A _N. J. A. Sloane_, Jun 16 2003