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A025560 a(n) = LCM{1, C(n-1,1), C(n-2,2), ..., C(n-[ n/2 ],[ n/2 ])}. 4

%I #6 Mar 30 2012 18:56:04

%S 1,1,2,3,12,30,60,210,840,1260,2520,13860,27720,180180,360360,180180,

%T 720720,6126120,12252240,116396280,232792560,116396280,232792560,

%U 2677114440,5354228880,13385572200,26771144400,40156716600,80313433200,1164544781400

%N a(n) = LCM{1, C(n-1,1), C(n-2,2), ..., C(n-[ n/2 ],[ n/2 ])}.

%p f:=n->ilcm(seq(binomial(n-i,i),i=0..floor(n/2)));

%Y Cf. A025562.

%K nonn

%O 1,3

%A _Clark Kimberling_

%E Entry revised by _N. J. A. Sloane_, May 26 2005

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)