Search: id:A046212
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%I A046212
%S A046212 1,1,1,6,1,30,1,140,1,630,1,2772,1,12012,1,51480,1,218790,1,923780,1,
%T A046212 3879876,1,16224936,1,67603900,1,280816200,1,1163381400,1,4808643120,1,
%U A046212 19835652870,1,81676217700,1,335780006100,1,1378465288200,1
%N A046212 First numerator and then denominator of central elements of Leibniz's 
               Harmonic Triangle.
%D A046212 L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 83, Problem 25.
%Y A046212 Cf. A003506.
%Y A046212 Cf. A002457.
%Y A046212 Sequence in context: A147327 A145629 A118933 this_sequence A120105 A120101 
               A030524
%Y A046212 Adjacent sequences: A046209 A046210 A046211 this_sequence A046213 A046214 
               A046215
%K A046212 nonn,easy
%O A046212 1,4
%A A046212 Mohammad K. Azarian (ma3(AT)evansville.edu)
%E A046212 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Dec 13 1999

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