0,3

Essentially the same as A072374. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 18 2008

a(n)=sum{k=0..n, C(k,n-k)*(n-k)!}.

Sequence in context: A036648 A047750 A072187 this_sequence A072374 A107113 A032256

Adjacent sequences: A122849 A122850 A122851 this_sequence A122853 A122854 A122855

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Sep 14 2006