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 A280690 a(n) = A000045(n) / A105800(n); the n-th Fibonacci number divided by its largest Fibonacci proper divisor. 4
 1, 1, 2, 3, 5, 4, 13, 7, 17, 11, 89, 18, 233, 29, 122, 47, 1597, 76, 4181, 123, 842, 199, 28657, 322, 15005, 521, 5777, 843, 514229, 1364, 1346269, 2207, 39602, 3571, 709805, 5778, 24157817, 9349, 271442, 15127, 165580141, 24476, 433494437, 39603, 1860497, 64079, 2971215073, 103682, 598364773, 167761, 12752042, 271443 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS A000045 is a divisibility sequence. LINKS Antti Karttunen, Table of n, a(n) for n = 1..377 Wikipedia, Divisibility sequence FORMULA a(n) = A000045(n) / A105800(n) = A000045(n) / A000045(A032742(n)). a(n) = A280687(A000045(n)). Other identities. For all n >= 1: a(A032742(n)) = A280689(n). PROG (Scheme, two alternatives) (define (A280690 n) (/ (A000045 n) (A105800 n))) (define (A280690 n) (A280687 (A000045 n))) CROSSREFS Cf. A000045, A032742, A105800, A280687, A280689. Sequence in context: A309373 A131401 A061446 * A240000 A193770 A107476 Adjacent sequences:  A280687 A280688 A280689 * A280691 A280692 A280693 KEYWORD nonn AUTHOR Antti Karttunen, Jan 11 2017 STATUS approved

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Last modified September 17 06:52 EDT 2019. Contains 327119 sequences. (Running on oeis4.)