%I A131385
%S A131385 1,2,6,16,60,144,672,1536,6480,19200,76032,165888,1048320,2257920,
%T A131385 8294400,28311552,126904320,268738560,1470873600,3096576000,
%U A131385 16094453760,51385466880,175814737920,366917713920,2717245440000
%N A131385 Product ceiling(n/1)*ceiling(n/2)*ceiling(n/3)*...*ceiling(n/n) (the 
               'ceiling factorial').
%F A131385 a(n)=product{1<=k<=n} ceiling(n/k).
%Y A131385 Cf. A010786, A131387.
%Y A131385 Sequence in context: A068787 A073959 A006820 this_sequence A027742 A033301 
               A093113
%Y A131385 Adjacent sequences: A131382 A131383 A131384 this_sequence A131386 A131387 
               A131388
%K A131385 nonn
%O A131385 1,2
%A A131385 Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jul 08 2007