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 A034883 Maximum length of Euclidean algorithm starting with n and any i
 0, 1, 2, 2, 3, 2, 3, 4, 3, 3, 4, 4, 5, 4, 4, 4, 4, 5, 5, 4, 6, 4, 5, 4, 5, 5, 5, 5, 6, 6, 6, 5, 5, 7, 5, 5, 6, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 6, 7, 7, 6, 6, 6, 5, 8, 6, 6, 6, 6, 7, 6, 6, 6, 7, 7, 7, 7, 7, 7, 6, 7, 6, 7, 7, 7, 8, 6, 6, 8, 8, 8, 7, 7, 6, 7, 7, 7, 7, 9, 6, 7, 7, 7, 7, 7, 6, 8, 7, 7, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Apart from initial term, same as A071647. - Franklin T. Adams-Watters, Nov 14 2006 Records occur when n is a Fibonacci number. For n>1, the smallest i such that the algorithm requires a(n) steps is A084242(n). The maximum number of steps a(n) is greater than k for n > A188224(k). - T. D. Noe, Mar 24 2011 Largest term in n-th row of A051010. - Reinhard Zumkeller, Jun 27 2013 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 Eric W. Weisstein, MathWorld: Euclidean Algorithm MATHEMATICA GCDSteps[n1_, n2_] := Module[{a = n1, b = n2, cnt = 0}, While[b > 0, cnt++; {a, b} = {Min[a, b], Mod[Max[a, b], Min[a, b]]}]; cnt]; Table[Max @@ Table[GCDSteps[n, i], {i, 0, n - 1}], {n, 100}] (* T. D. Noe, Mar 24 2011 *) PROG (Haskell) a034883 = maximum . a051010_row  -- Reinhard Zumkeller, Jun 27 2013 CROSSREFS Sequence in context: A181948 A238943 A070081 * A071647 A051125 A321126 Adjacent sequences:  A034880 A034881 A034882 * A034884 A034885 A034886 KEYWORD easy,nonn AUTHOR STATUS approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)