%I A051582
%S A051582 1,10,120,1680,26880,483840,9676800,212889600,5109350400,132843110400,
%T A051582 3719607091200,111588212736000,3570822807552000,121407975456768000,
%U A051582 4370687116443648000,166086110424858624000,6643444416994344960000
%N A051582 (2*n+8)!!/8!!, related to A000165 (even double factorials).
%C A051582 Row m=8 of the array A(3; m,n) := (2*n+m)!!/m!!, m >= 0, n >= 0.
%F A051582 a(n) = (2*n+8)!!/8!!; e.g.f.: 1/(1-2*x)^5.
%F A051582 a(n)=n!*2^(n-5)/12, n>=4 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Sep 23 2006
%t A051582 s=1;lst={s};Do[s+=(s*=n);AppendTo[lst, s], {n, 5, 5!}];lst [From Vladimir 
               Orlovsky (4vladimir(AT)gmail.com), Nov 15 2008]
%Y A051582 Cf. A000165, A001147(n+1), A002866(n+1), A051577-A051581 (rows m=0..7).
%Y A051582 Sequence in context: A005949 A027568 A034255 this_sequence A122420 A069671 
               A138445
%Y A051582 Adjacent sequences: A051579 A051580 A051581 this_sequence A051583 A051584 
               A051585
%K A051582 easy,nonn
%O A051582 0,2
%A A051582 Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)