Search: id:A034255
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%I A034255
%S A034255 1,10,120,1560,21216,297024,4243200,61526400,902387200,13355330560,
%T A034255 199115837440,2986737561600,45030812467200,681895160217600,
%U A034255 10364806435307520,158063298138439680,2417438677411430400
%N A034255 Related to quartic factorial numbers A007696.
%H A034255 W. Lang, <a href="http://www.cs.uwaterloo.ca/journals/JIS/index.html">
               On generalizations of Stirling number triangles</a>, J. Integer Seqs., 
               Vol. 3 (2000), #00.2.4.
%F A034255 a(n) = 4^(n-1)*A007696(n)/n!, A007696(n)=(4*n-3)(!^4) := product(4*j-3, 
               j=1..n), n >= 1; G.f. (-1+(1-16*x)^(-1/4))/4.
%F A034255 Convolution of A034385(n-1) with A025749(n), n >= 1.
%Y A034255 Cf. A007696. a(n)= A048882(n, 1) (first column of triangle).
%Y A034255 Sequence in context: A024127 A005949 A027568 this_sequence A051582 A122420 
               A069671
%Y A034255 Adjacent sequences: A034252 A034253 A034254 this_sequence A034256 A034257 
               A034258
%K A034255 easy,nonn
%O A034255 1,2
%A A034255 Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)

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