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A065219
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Number of subsets of proper divisors of numbers in A065218 summing to the number.
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1
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1, 2, 5, 7, 10, 34, 278, 751, 2157, 22208, 676327, 2225346, 23259536, 265050967, 39161483067, 70455119174849, 776384598617893, 133991542908557129, 21819590324155207874, 263763825614848727692, 12883245190231409112736, 661394651111310011564685
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The numbers themselves are in A065218.
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FORMULA
| a(n) = A065205(A065218(n))
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EXAMPLE
| Proper divisors of 12 are {1,2,3,4,6}. Two subsets of this sum to 12: {2,4,6} and {1,2,3,6} - more than any smaller number, so 2 is in the sequence (and 12 is in A065218).
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CROSSREFS
| Cf. A065218, A064771, A063205, A005835, A002182, A004394.
Sequence in context: A156779 A076802 A024374 * A013660 A020484 A124203
Adjacent sequences: A065216 A065217 A065218 * A065220 A065221 A065222
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KEYWORD
| nonn
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AUTHOR
| Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu), Oct 21 2001
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EXTENSIONS
| Extended by Max Alekseyev (maxale(AT)gmail.com), May 29 2009
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