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A246852
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Numbers n such that sigma(n+2) - sigma(n) = n + 2.
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7
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1, 2, 22, 14926, 31048, 69106, 246262, 5860168, 307164670, 881198662, 1489455646, 2386555630, 8225563702, 14311679062, 111494234182, 154357775302, 299004519622, 870455062822, 970388922262, 991817878342, 1677028870822, 1782783762502, 1830446935222
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Number 22 is in sequence because sigma(22+2) - sigma(22) = 60 - 36 = 24 = 22 + 2.
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PROG
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(Magma) [n:n in[1..10^7] | SumOfDivisors(n+2)-SumOfDivisors(n) eq n+2]
(PARI)
for(n=1, 10^7, if(sigma(n+2)-sigma(n)==n+2, print1(n, ", "))) \\ Derek Orr, Sep 05 2014
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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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