A056919 - OEIS

%I #6 Sep 16 2022 15:24:33

%S 0,1,1,0,-2,-2,4,10,-6,-46,-16,214,310,-974,-3144,3674,28826,-566,

%T -260000,-254906,2345094,4894154,-20901880,-74737574,176084986,

%U 1072935874,-1216168944,-15164335306,1862029910,214162724194,186232275544,-3026208587366,-6005924996070,42413412401786

%N Numerators of continued fraction for left factorial.

%F a(0)=0; a(1)=1; a(n) = a(n-1) - floor(n/2)*a(n-2).

%K sign,frac,easy

%O 0,5

%A _Aleksandar Petojevic_, Sep 05 2000

%E More terms from _James A. Sellers_, Sep 06 2000