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A330579
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Numbers k such that the k-th composite number divides the sum of the first k composite numbers.
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2
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1, 4, 493, 1565, 6210, 26375, 64019, 289862, 870828, 1244485, 3313113, 4300012, 7946206, 1447234860, 4147639664, 7190149312, 23828369695, 39710847388, 494027033160, 982853084580, 1095174951021, 1141650682059, 1522735118076, 1642938906044
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OFFSET
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1,2
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COMMENTS
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This sequence corresponds to the positions of zeros in A330578.
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LINKS
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EXAMPLE
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The first 4 composite numbers are: 4, 6, 8 and 9.
As 4 + 6 + 8 + 9 = 3*9, 4 belongs to the sequence.
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PROG
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(PARI) s=0; k=0; forcomposite (c=4, oo, k++; s+=c; if (s%c==0, print1 (k", ")))
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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