%I #3 Mar 30 2012 16:47:20
%S 0,2,6,12,24,40,72,126,240,459,940,1936,4104,8671,18508,39300,83616,
%T 177055,374652,789811,1662400,3488877,7309588,15279406,31886928,
%U 66422275,138157708,286924599,595102144,1232672869
%N n(n+Z(n)), where Z( ) is the Narayana-Zidek-Capell sequence (A002083).
%Y Cf. A002083.
%K nonn
%O 0,2
%A _N. J. A. Sloane_.