Exchange 2 and 3 in the prime factorization of n.
1, 3, 2, 9, 5, 6, 7, 27, 4, 15, 11, 18, 13, 21, 10, 81, 17, 12, 19, 45, 14, 33, 23, 54, 25
2 seqfan posts
Thu Jun 24 15:22:13 CEST 2010 [seqfan] Re: 4-12-28-60
Wed Jun 23 22:36:42 CEST 2010 [seqfan] Re: 4-12-28-60
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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