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A065900
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Numbers n such that sigma(n) = sigma(n-1) + sigma(n-2).
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17
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3, 4, 24, 1968, 3264, 5016, 60456, 1016508, 4420164, 12055512, 14365608, 25726728, 27896424, 66562308, 72764736, 98734968, 175186656, 224868312, 253694928, 288657204, 386668344, 421575408, 504737748, 630645456, 1493548000, 1653797796, 2120325012, 2221315152
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OFFSET
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1,1
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COMMENTS
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No other terms less than 1000000000. - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Nov 23 2004
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LINKS
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FORMULA
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PROG
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(PARI) s1=1; s2=3; for(n=3, 10^8, s3=sigma(n); if(s3==s1+s2, print1(n ", ")); s1=s2; s2=s3) /* Donovan Johnson, Apr 06 2013 */
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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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More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Nov 23 2004
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STATUS
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approved
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