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Search: id:A074124
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| A074124 |
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Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives sum of n-th group. |
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+0
4
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| 4, 6, 165, 49, 143, 962, 884, 1577, 6992, 3161, 3565, 1924, 8159, 18834, 41877, 2332, 2360, 2867, 34304, 184245, 70883, 15405, 8798, 107512, 216213, 136855, 49131, 31030, 105621, 783994, 49911, 6288, 426070, 571429, 639210, 404982
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) c=3:for(n=1, 50, s=0:while((s==0||s%prime(n)>0), c=c+1: if(isprime(c), c=c+1):s=s+c):print1(s", "))
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CROSSREFS
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Cf. A074125, A074126, A074127.
Sequence in context: A052672 A137025 A070155 this_sequence A070156 A081970 A076098
Adjacent sequences: A074121 A074122 A074123 this_sequence A074125 A074126 A074127
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 27 2002
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EXTENSIONS
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Corrected and extended by Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 22 2003
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