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Search: id:A104074
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| A104074 |
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a(1)=1. a(n) = a(n-1) + (number of terms, from among terms a(1) through a(n-1), which divide sum{k=1 to n-1} a(k)). |
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+0
2
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| 1, 2, 3, 6, 10, 12, 14, 19, 20, 22, 23, 29, 31, 36, 42, 47, 48, 49, 54, 60, 67, 68, 70, 71, 77, 78, 79, 83, 85, 90, 98, 100, 105, 107, 109, 111, 116, 118, 130, 133, 134, 135, 137, 140, 141, 144, 146, 153, 155, 161, 162, 164, 165, 170, 175, 176, 178, 179, 184, 186, 188
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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The sum of the first 7 terms of the sequence is 48. There are 5 terms from among the first 7 terms which divide 48. (Those terms are a(1)=1, a(2)=2, a(3)=3, a(4)=6, a(6)=12). So a(8) = a(7) + 5 = 19.
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CROSSREFS
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Sequence in context: A001635 A106172 A090695 this_sequence A140785 A038775 A065029
Adjacent sequences: A104071 A104072 A104073 this_sequence A104075 A104076 A104077
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Jun 24 2007
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EXTENSIONS
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Corrected and extended by Joshua Zucker, Jul 18 2007
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