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a(n) = denominator of sum{k=1 to n} 1/A127518(k).
2

%I #6 Apr 09 2014 10:12:25

%S 1,3,24,120,120,840,840,840,280,2520,27720,27720,360360,360360,360360,

%T 720720,12252240,4084080,77597520,15519504,15519504,5173168,118982864,

%U 356948592,8923714800,80313433200,80313433200,80313433200,2329089562800

%N a(n) = denominator of sum{k=1 to n} 1/A127518(k).

%Y Cf. A127518, A127519.

%K frac,nonn

%O 1,2

%A _Leroy Quet_, Jan 17 2007

%E Extended by _Ray Chandler_, Jan 22 2007