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 A051392 First differences of A052006. 2
 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 10, 13, 13, 13, 10, 13, 13, 10 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Does this sequence only contain 10's and 13's? Yes. Since all blocks of terms of A052005 are of the form 1(12)n, a(n) must be congruent to 1 modulo 3. [1, 2] blocks give an average growth rate of 3/2 powers of phi for every power of two, but since phi^3 > 4, singleton 1's are required to slow growth when errors get too large. Since singleton 1's reduce the growth rate by 1/2 power of phi per power of two, they should occur roughly once every (1/2) / log_2(phi^1.5 / 2) ~ 12.088 powers of phi. Therefore, a(n) will be 13 most of the time, with 10 occurring when needed to maintain this ratio. - Charlie Neder, Oct 24 2018 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1650 MATHEMATICA With[{F = Fibonacci}, Reap[For[n = 0, n < 1000, n++, If[F[n - 1] < 2^Floor[Log[2, F[n]]] && F[n + 1] >= 2^(Floor[Log[2, F[n]]] + 1) && F[n + 2] >= 2^(Floor[Log[2, F[n]]] + 2), Sow[n]]]][[2, 1]]] // Differences (* Jean-François Alcover, Feb 27 2016 *) CROSSREFS Sequence in context: A175850 A176306 A291368 * A291431 A291474 A112126 Adjacent sequences:  A051389 A051390 A051391 * A051393 A051394 A051395 KEYWORD nonn,nice AUTHOR Antti Karttunen and Patrick De Geest, Nov 15 1999 STATUS approved

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Last modified March 20 05:29 EDT 2019. Contains 321344 sequences. (Running on oeis4.)