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Search: id:A128020
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| A128020 |
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a(n) = the multiple of n which is > (sum{k=1 to n-1} a(k)) and is <= (n + sum{k=1 to n-1} a(k)). |
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+0
3
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| 1, 2, 6, 12, 25, 48, 98, 200, 396, 790, 1584, 3168, 6331, 12670, 25335, 50672, 101354, 202698, 405403, 810800, 1621599, 3243196, 6486391, 12972792, 25945575, 51891164, 103782330, 207564644, 415129287, 830258580, 1660517170, 3321034336
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) = n * (1+ floor(sum{k=1 to n-1} a(k) /n)).
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MATHEMATICA
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f[l_List] := Block[{n = Length[l] + 1}, Append[l, n*(1 + Floor[Plus @@ l/n])]]; Nest[f, {}, 33] (*Chandler*)
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CROSSREFS
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Cf. A128021, A128022.
Sequence in context: A034882 A137829 A045925 this_sequence A116562 A099495 A034875
Adjacent sequences: A128017 A128018 A128019 this_sequence A128021 A128022 A128023
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KEYWORD
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easy,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Feb 11 2007
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 12 2007
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