a(1) = 5, a(n) = sigma(a(n-1)).
5, 6, 12, 28, 56, 120, 360, 1170, 3276, 10192, 24738, 61440, 196584, 491520
2 seqfan posts
Mon Feb 15 20:54:25 CET 2010 [seqfan] Re: Mystery tour with a(n)=sigma(a(n-1))
Mon Feb 15 19:38:31 CET 2010 [seqfan] Mystery tour with a(n)=sigma(a(n-1))
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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