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Search: id:A091291
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| A091291 |
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Numbers x such that the quotient q=(sigma[x]+sigma[x+1])/sigma[2x+1] is smaller than 0.5, that is (sigma[x]+sigma[x+1])/>2.sigma[2x+1]; sigma=A000203. |
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| 1283782, 3445942, 4662157, 5743237, 7770262, 8806297, 8986477, 9572062, 9920137, 10472962, 11356537, 11554042, 12635122, 12870742
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