%I A117826
%S A117826 1,2,3,4,2,4,6,8,6,12,18,24,24,48,72,96,120,240,360,480,720,1440,2160,
%T A117826 2880,5040,10080,15120,20160,40320,80640,120960,161280,362880,725760,
%U A117826 1088640,1451520,3628800,7257600,10886400,14515200,39916800,79833600
%N A117826 First four terms of the sequence are doubled, then those numbers are 
               tripled and then those numbers are quadrupled, etc.
%F A117826 a(4n-3) = A000142(n). a(4n-2)=2*A000142(n)=A052849(n), a(4n-1)=3*A000142(n)=A052560(n), 
               a(4n)=4*A000142(n)=2*A052849(n)=A052578(n).
%t A117826 Table[n!{1, 2, 3, 4}, {n, 11}] // Flatten
%Y A117826 Cf. A000142, A115425.
%Y A117826 Sequence in context: A023632 A107572 A043264 this_sequence A075994 A100798 
               A121701
%Y A117826 Adjacent sequences: A117823 A117824 A117825 this_sequence A117827 A117828 
               A117829
%K A117826 nonn
%O A117826 1,2
%A A117826 Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 25 2006