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 A244328 a(1) = a(2) = 0; for n >= 3: a(n) = floor((n*(n+1)/2) / antisigma(n)) = floor(A000217(n) / A024816(n)). 3
 0, 0, 3, 3, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Index entries for linear recurrences with constant coefficients, signature (1). FORMULA a(n) = 1 for n >= 7. a(n) = A244327(n) - A244329(n) for n >= 7. EXAMPLE For n = 10; a(10) = floor(A000217(10) / A024816(10)) = floor(55 / 37) = 1. PROG (MAGMA) [Floor((n*(n+1)div 2) div ((n*(n+1)div 2)-SumOfDivisors(n))): n in [3..1000]] (PARI) if(n>6, 1, [0, 0, 3, 3, 1, 2][n]) \\ Charles R Greathouse IV, May 15 2015 CROSSREFS Cf. A000203, A000217, A024816, A244327, A244329. Sequence in context: A173503 A100940 A063421 * A073067 A003637 A317413 Adjacent sequences:  A244325 A244326 A244327 * A244329 A244330 A244331 KEYWORD nonn,easy AUTHOR Jaroslav Krizek, Jul 08 2014 STATUS approved

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Last modified December 5 23:39 EST 2019. Contains 329784 sequences. (Running on oeis4.)