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%I #13 May 03 2020 09:16:43
%S 1,1,1,2,4,1,15,33,56,495,420,330,3960,3432,3003,2574,80080,1601145,
%T 1225224,1108536,1007760,912912,19399380,17612595,82372752,149978400,
%U 212469400,196846650,5354228880,4976687100,145568097675,273491577450,257403837600,242695046880
%N a(n) = A081537(n)/A081535(n), with a(2) = 1 by convention.
%Y Cf. A081535, A081536, A081537.
%K nonn
%O 1,4
%A _Amarnath Murthy_, Mar 28 2003
%E Corrected, terms a(4)-a(19) added by _Charlie Neder_, Feb 03 2019
%E More terms from _Jinyuan Wang_, May 03 2020
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