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%I #4 Oct 01 2021 18:06:13
%S 1,4,44,1360,118864,29454720,20723316480,41430374667264,
%T 235483137163985920,3806579106735674587136,
%U 175045931960590896961989632,22902901668710944230193460535296,8527272133354589357030560193109508096
%N Hankel transform of A047098.
%F a(n) = 2^n*A051255(n).
%Y Cf. A047098, A051255.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Jan 21 2007
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