Search: id:A001820
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%I A001820 M4952 N2121
%S A001820 1,14,273,7645,296296,15291640,1017067024,84865562640,8689315795776,
%T A001820 1071814846360896,156823829909121024,26862299458337581056
%N A001820 Central factorial numbers.
%C A001820 a(n-2) is the coefficient of x^3 in Prod[k=0..n, x+k^2].
%D A001820 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001820 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001820 J. Riordan, Combinatorial Identities, Wiley, 1968, p. 217.
%Y A001820 Cf. A049033.
%Y A001820 Third right-hand column of triangle A008955.
%Y A001820 Sequence in context: A138560 A051690 A048668 this_sequence A053101 A027401 
               A158475
%Y A001820 Adjacent sequences: A001817 A001818 A001819 this_sequence A001821 A001822 
               A001823
%K A001820 nonn
%O A001820 0,2
%A A001820 N. J. A. Sloane (njas(AT)research.att.com).

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