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A169902 Earliest sequence such that xy | a(x+y) and (x+y) | a(xy) for all x>=1, y>=1. 0
2, 3, 4, 60, 12, 2520, 120, 5040, 2520, 277200, 2520, 4324320, 27720, 5045040, 10810800, 49008960, 720720, 4190266080, 12252240, 4655851200, 4888643760, 117793035360, 232792560, 642507465600, 26771144400, 2088149263200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

CROSSREFS

Sequence in context: A282034 A096782 A098811 * A004855 A097930 A012322

Adjacent sequences:  A169899 A169900 A169901 * A169903 A169904 A169905

KEYWORD

nonn,nice

AUTHOR

Andrew Weimholt, Jul 05 2010

STATUS

approved

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Last modified November 20 12:29 EST 2017. Contains 294971 sequences.