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A120878
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a(n) = sum of first n terms of sequence A120877.
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1
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1, 2, 4, 7, 9, 12, 18, 25, 27, 31, 33, 37, 39, 43, 45, 49, 52, 64, 76, 88, 100, 112, 125, 127, 129, 134, 144, 167, 169, 172, 187, 189, 196, 214, 226, 238, 252, 284, 300, 331, 333, 339, 345, 354, 374, 387, 394, 407, 409, 411, 417, 423, 430, 447, 453, 459, 467, 469
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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PROG
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(PARI) {m=60; v=[1]; for(n=2, m, a=0; q=sum(i=1, n-1, v[i]); for(j=1, n-1, if(q%v[j]==0, a++)); print1(q, ", "); v=concat(v, a))} - (Klaus Brockhaus, Aug 16 2006)
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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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