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0, 1, 5, 11, 59, 179, 1259, 2519, 7559, 37799, 415799, 1247399, 16216199, 113513399, 567566999, 1135133999, 19297277999, 57891833999, 1099944845999, 5499724229999, 38498069609999, 423478765709999, 9740011611329999
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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FORMULA
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a(n) = (a(n-1) + 1) * A006530(n) - 1 for n>1, a(1) = 0;
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MATHEMATICA
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FoldList[Times, Table[FactorInteger[n][[-1, 1]], {n, 30}]]-1 (* Harvey P. Dale, May 28 2018 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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