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 A066416 Number of numbers m such that the sum of the anti-divisors of m is n+1. 2
 0, 1, 1, 1, 1, 0, 0, 2, 0, 1, 0, 1, 1, 2, 0, 1, 0, 2, 1, 0, 0, 1, 1, 3, 0, 0, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0, 0, 1, 1, 1, 3, 0, 0, 0, 2, 0, 1, 0, 1, 0, 3, 0, 1, 1, 3, 1, 3, 0, 1, 0, 0, 0, 2, 0, 1, 0, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 0, 2, 0, 2, 0, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS See A066272 for definition of anti-divisor. LINKS Jon Perry, Anti-divisor Jon Perry, The Anti-divisor [Cached copy] Jon Perry, The Anti-divisor: Even More Anti-Divisors [Cached copy] EXAMPLE 8 has anti-divisors 1, 3 and 5, whose sum is 9 and 9 has anti-divisors 1, 2 and 6, whose sum is 9 and there are no others. Therefore a(8)=2. CROSSREFS Cf. A066417, A066418, A058838, A066241. Sequence in context: A328616 A260736 A293896 * A292342 A091991 A108234 Adjacent sequences:  A066413 A066414 A066415 * A066417 A066418 A066419 KEYWORD nonn,more AUTHOR Jon Perry, Dec 28 2001 STATUS approved

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Last modified March 31 03:48 EDT 2020. Contains 333136 sequences. (Running on oeis4.)