%I A123024
%S A123024 1,1,2,2,4,8,12,28,60,112,284,652,1404,3776,9228,22028,62092,160448,
%T A123024 414540,1216012,3302604,9092272,27622844,78446956,227652828,713772368,
%U A123024 2110379772,6405093068,20668461340,63385346912,200011067244
%N A123024 Simple Scaled differential equation recursion RF: a[n+2]=(a(n)+a(n-1))/
               ((n+2)*(n+1)).
%D A123024 Richard Bronson, Schaum's Outline of Modern Introductory Differential 
               Equations, MacGraw-Hill, New York,1973, page 107, solved problem 
               19.15
%F A123024 a(n) = (a(n-2)+a(n-3)/(n*(n - 1)) output= a(n)*n!
%t A123024 a[n_] := a[n] = (a[n - 2] + a[n - 3])/(n*(n - 1)); a[0] = 1; a[1] = 1; 
               a[2] = 1; Table[a[n]*n!, {n, 0, 30}]
%Y A123024 Sequence in context: A102456 A032067 A153996 this_sequence A079092 A039941 
               A104700
%Y A123024 Adjacent sequences: A123021 A123022 A123023 this_sequence A123025 A123026 
               A123027
%K A123024 nonn,uned
%O A123024 1,3
%A A123024 Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 24 2006