login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

a(n) = (1/C(n,0) - 1/C(n,1) + ... + d/C(n,k))*L, where d = (-1)^k,k = [ n/2 ], L = LCM{C(n,0), C(n,1),..., C(n,n)}.
0

%I #3 Mar 30 2012 18:56:03

%S 1,1,1,2,11,9,51,92,254,230,2305,2130,25755,24031,22519,42392,680708,

%T 644868,11639502,11085300,10581510,10121430,223092705,214169076,

%U 1029659598,991523962,2868336757,2769428662,77636319761,75131921865,2256305506455

%N a(n) = (1/C(n,0) - 1/C(n,1) + ... + d/C(n,k))*L, where d = (-1)^k,k = [ n/2 ], L = LCM{C(n,0), C(n,1),..., C(n,n)}.

%K nonn

%O 0,4

%A _Clark Kimberling_