%I A019437
%S A019437 1,3,6,120,
%T A019437 9290976268679343135539052852903295259378814351580596958743987989307824385062448596342880785099979140705774497\
               073908459100742234151955724805414557103318958341618000723968000000000000000000000000000
%N A019437 a(n) = a(n-1)!/a(n-2)!; a(0) = 1, a(1) = 3.
%Y A019437 Sequence in context: A046488 A074880 A115647 this_sequence A163423 A083149 
               A068375
%Y A019437 Adjacent sequences: A019434 A019435 A019436 this_sequence A019438 A019439 
               A019440
%K A019437 nonn
%O A019437 0,2
%A A019437 N. J. A. Sloane (njas(AT)research.att.com), Dec 21 2001