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A165897
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a(n)=a(n-1)+(largest proper divisor of a(n-1), a(1)=4.
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0
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4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 729, 972, 1458, 2187, 2916, 4374, 6561, 8748, 13122, 19683, 26244, 39366, 59049, 78732, 118098, 177147, 236196, 354294, 531441, 708588, 1062882, 1594323, 2125764, 3188646, 4782969
(list; graph; refs; listen; history; internal format)
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