Earliest sequence such that xy | a(x+y) and (x+y) | a(xy) for all x>=1, y>=1.
2, 3, 4, 60, 12, 2520, 120, 5040, 2520, 277200, 2520, 4324320, 27720, 5045040
5 seqfan posts
Sat Jul 10 06:03:21 CEST 2010 [seqfan] Re: A169902: all ones(?)
Sat Jul 10 04:37:02 CEST 2010 [seqfan] Re: A169902: all ones(?)
Sat Jul 10 00:00:44 CEST 2010 [seqfan] Re: A169902: all ones(?)
Sat Jul 10 00:00:44 CEST 2010 [seqfan] Re: A169902: all ones(?)
Fri Jul 9 23:50:26 CEST 2010 [seqfan] A169902: all ones(?)
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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