%I #5 Mar 30 2012 18:39:18
%S 2,1,1,4,3,8,2,5,15,10,5,10,19,4,20,23,17,3,5,12,0,33,23,22,35,3,20,
%T 12,15,22,51,9,29,19,7,17,56,37,31,76,24,47,30,59,59,66,34,18,12,5,10,
%U 69,62,21,65,55,37,102,79,36,91,47,2,123,46,117,10,49,28,4,57,31,38,22,99
%N e=sum(n>=0, a(n)/2^n/n!).
%o (PARI) a(n)=if(n<1,2,floor(n!*2^n*exp(1))-2*n*floor((n-1)!*2^(n-1)*exp(1)))
%K nonn
%O 0,1
%A _Benoit Cloitre_, Jun 03 2003
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