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A126697
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a(0)=1. For n>=1, a(n) = a(n-1) + (largest divisor of n which occurs among the earlier terms of the sequence).
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0
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1, 2, 4, 5, 9, 14, 16, 17, 21, 30, 35, 36, 40, 41, 55, 60, 76, 93, 102, 103, 108, 129, 131, 132, 136, 141, 143, 152, 166, 167, 197, 198, 214, 215, 232, 267, 303, 304, 306, 307, 347, 388, 409, 410, 414, 423, 425, 426, 442, 443, 448, 465, 469, 470, 479, 534, 548
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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f[l_List] := Append[l, l[[ -1]] + Max @@ Intersection[l, Divisors[Length[l]]]]; Nest[f, {1}, 60] (* Ray Chandler, Feb 19 2007 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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