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 A035614 Horizontal para-Fibonacci sequence: says which column of Wythoff array (starting column count at 0) contains n. 11
 0, 1, 2, 0, 3, 0, 1, 4, 0, 1, 2, 0, 5, 0, 1, 2, 0, 3, 0, 1, 6, 0, 1, 2, 0, 3, 0, 1, 4, 0, 1, 2, 0, 7, 0, 1, 2, 0, 3, 0, 1, 4, 0, 1, 2, 0, 5, 0, 1, 2, 0, 3, 0, 1, 8, 0, 1, 2, 0, 3, 0, 1, 4, 0, 1, 2, 0, 5, 0, 1, 2, 0, 3, 0, 1, 6, 0, 1, 2, 0, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS This is probably the same as the "Fibonacci ruler function" mentioned by Knuth. - N. J. A. Sloane, Aug 03 2012 REFERENCES D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.3, p. 82, solution to Problem 179. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 Casey Mongoven, Sonification of multiple Fibonacci-related sequences, Annales Mathematicae et Informaticae, 41 (2013) pp. 175-192. N. J. A. Sloane, Classic Sequences FORMULA The segment between the first M and the first M+1 is given by the segment before the first M-1. a(n) = A122840(A014417(n + 1)). MATHEMATICA max = 81; wy = Table[(n-k)*Fibonacci[k] + Fibonacci[k+1]*Floor[ GoldenRatio*(n - k + 1)], {n, 1, max}, {k, 1, n}]; a[n_] := Position[wy, n][[1, 2]]-1; Table[a[n], {n, 1, max}] (* Jean-François Alcover, Nov 02 2011 *) PROG (Haskell) a035614 = a122840 . a014417 . (+ 1)  -- Reinhard Zumkeller, Mar 10 2013 (Python) from sympy import fibonacci def a122840(n): return len(str(n)) - len(str(int(str(n)[::-1]))) def a014417(n):     k=0     x=0     while n>0:         k=0         while fibonacci(k)<=n: k+=1         x+=10**(k - 3)         n-=fibonacci(k - 1)     return x def a(n): return a122840(a014417(n + 1)) # Indranil Ghosh, Jun 09 2017, after Haskell code by Reinhard Zumkeller CROSSREFS Cf. A019586, A035513, A035614. Sequence in context: A065134 A088673 A236138 * A212138 A133735 A238801 Adjacent sequences:  A035611 A035612 A035613 * A035615 A035616 A035617 KEYWORD nonn,nice,easy AUTHOR STATUS approved

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Last modified May 29 07:47 EDT 2020. Contains 334697 sequences. (Running on oeis4.)