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 A082730 a(n) = smallest number k such that k - ms(k) = n, or 0 if no such number has been found, where ms(k) = sum of divisors of k other than k. 2
 6, 1, 3, 0, 5, 9, 7, 50, 22, 0, 11, 244036, 13, 0, 27, 0, 17, 0, 19, 25, 46, 0, 23, 0, 124, 98, 58, 0, 29, 0, 31, 0, 250, 0, 57, 0, 37, 484, 55, 0, 41, 49, 43, 0, 94, 0, 47, 225, 1264, 0, 106, 0, 53, 0, 87, 0, 118, 0, 59, 0, 61, 2888, 85, 0, 134, 0, 67, 0, 142, 0, 71, 676, 73, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS F. Firoozbakht, M. F. Hasler, Variations on Euclid's formula for Perfect Numbers, JIS 13 (2010) #10.3.1 EXAMPLE a(5) = 9 because the first 5 in A033879 is A033879(9). CROSSREFS Cf. A082731. Cf. A001065, A033879. Sequence in context: A156792 A021624 A021066 * A010136 A087256 A154911 Adjacent sequences:  A082727 A082728 A082729 * A082731 A082732 A082733 KEYWORD nonn AUTHOR Amarnath Murthy, Apr 14 2003 EXTENSIONS More terms from David Wasserman, Sep 29 2004, who remarks that he searched up to 10^16. STATUS approved

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Last modified July 21 04:40 EDT 2019. Contains 325189 sequences. (Running on oeis4.)