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%I #18 Apr 15 2019 12:30:50
%S 1,2,14,263,13462,2104021,1366427911,6266456586228
%N Number of sequences of n positive integers with reciprocals adding up to an integer.
%H Kassie Archer, Abigail Bishop, Alexander Diaz-Lopez, Luis David Garcia Puente, Darren Glass, Joel Louwsma, <a href="https://arxiv.org/abs/1903.01393">Arithmetical structures on bidents</a>, arXiv:1903.01393 [math.CO], 2019.
%Y Row sums of A280519.
%Y Cf. A002967 (adding up to 1), A156871 (nondecreasing sequences), A280518 (increasing sequences).
%K nonn,hard,more
%O 1,2
%A _Max Alekseyev_, Jan 04 2017
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