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A280517
Number of sequences of n positive integers with reciprocals adding up to an integer.
3
1, 2, 14, 263, 13462, 2104021, 1366427911, 6266456586228
OFFSET
1,2
LINKS
Kassie Archer, Abigail Bishop, Alexander Diaz-Lopez, Luis David Garcia Puente, Darren Glass, Joel Louwsma, Arithmetical structures on bidents, arXiv:1903.01393 [math.CO], 2019.
CROSSREFS
Row sums of A280519.
Cf. A002967 (adding up to 1), A156871 (nondecreasing sequences), A280518 (increasing sequences).
Sequence in context: A156214 A370490 A187654 * A373222 A354511 A015197
KEYWORD
nonn,hard,more
AUTHOR
Max Alekseyev, Jan 04 2017
STATUS
approved