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%I #7 Apr 03 2023 21:09:05
%S 1,1,1,3,8,25,83,330,1538,8834,63723,591313,7180087,115411088,
%T 2472336977,70840464484,2720170935989,140167035897433,
%U 9702508891845883,903305670556552694,113233954374954246849,19137449587197829494989,4366006746295284220605007
%N Number of connected unlabeled tiered posets with n elements.
%C A tiered poset is a partially ordered set in which every maximal chain has the same length.
%H Andrew Howroyd, <a href="/A361959/b361959.txt">Table of n, a(n) for n = 0..40</a>
%o (PARI) \\ See PARI link in A361957 for program code.
%o A361959seq(20) \\ _Andrew Howroyd_, Apr 03 2023
%Y Row sums of A361958.
%Y Cf. A361912 (not necessarily connected).
%K nonn
%O 0,4
%A _Andrew Howroyd_, Apr 03 2023
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