0,3
a(n+1)=n!+(n-1)!(1-(-1)^n)/2; a(n+2)=2*A052558(n).
Sequence in context: A130102 A113464 A054093 this_sequence A003616 A079895 A053047
Adjacent sequences: A098554 A098555 A098556 this_sequence A098558 A098559 A098560
easy,nonn
Paul Barry (pbarry(AT)wit.ie), Sep 14 2004
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