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A208480 Number of representations of n as m_1/1 + m_2/2 + ... + m_n/n where m_i are nonnegative integers. 5
1, 3, 10, 55, 196, 2730, 10032, 108999, 973258, 20780331, 79309308, 2614200602, 10073335754, 288845706742, 11805287917646, 254331289285523 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Number of unordered partitions of n into reciprocals of positive integers <= n.

LINKS

Table of n, a(n) for n=1..16.

Karan, A simple looking problem in partitions that became increasingly complex, discussion at MathOverflow.

CROSSREFS

Cf. A020473

Sequence in context: A054422 A074503 A229311 * A034234 A081721 A013009

Adjacent sequences:  A208477 A208478 A208479 * A208481 A208482 A208483

KEYWORD

nonn,more

AUTHOR

Brendan McKay and Max Alekseyev, May 07 2012

STATUS

approved

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Last modified April 20 13:33 EDT 2014. Contains 240806 sequences.