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%I #8 Mar 19 2024 22:34:16
%S 2,24,60,720,40320,181440,3628800,479001600,3113510400,87178291200,
%T 20922789888000,177843714048000,6402373705728000,2432902008176640000,
%U 25545471085854720000,1124000727777607680000,620448401733239439360000
%N Nonzero denominators in the expansion of sin(x)+exp(x)-1-2x.
%F a(3k+1)=(4k+2)!, a(3k+2)=(4k+4)!, a(3k+3)=(4k+5)!/2.
%K easy,nonn
%O 1,1
%A _Benoit Cloitre_, Mar 29 2002
%E Name clarified by _Sean A. Irvine_, Mar 19 2024
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