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%I #9 Oct 21 2019 02:09:47
%S 1,6,35,168,926,4294,23224,106690,571926,2617886,13965688,63815684,
%T 339452265,1549699466,8228066295,37543939462,199095075169,
%U 908167940082,4812012405883,21945589904716,116213845733553,529936445158768,2805163046954295,12790521159853090,67685654170211481
%N a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026703.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 21 2019
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