The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A165279 Table read by antidiagonals: T(n, k) is the k-th number with n-1 odd-indexed Fibonacci numbers in its Zeckendorf representation. 5
 1, 3, 2, 4, 5, 7, 8, 6, 15, 20, 9, 10, 18, 41, 54, 11, 13, 19, 49, 109, 143, 12, 14, 28, 52, 130, 287, 376, 21, 16, 36, 53, 138, 342, 753, 986, 22, 17, 39, 75, 141, 363, 897, 1973, 2583, 24, 23, 40, 96, 142, 371, 952, 2350, 5167, 6764, 25, 26, 44, 104, 198, 374 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS For n>=0, row n is the monotonic sequence of positive integers m such that the number of odd-indexed Fibonacci numbers in the Zeckendorf representation of m is n. We begin the indexing at 2; that is, 1=F(2), 2=F(3), 3=F(4), 5=F(5),... Every positive integer occurs exactly once in the array, so that as a sequence it is a permutation of the positive integers. For counts of even-indexed Fibonacci numbers, see A165278. Essentially, (row 0)=A054204, (column 1)=A035508. LINKS EXAMPLE Northwest corner: 1....3....4....8....9...11...12...21...22... 2....5....6...10...13...14...16...17...23... 7...15...18...19...28...36...39...40...44... 20..41...49...52...53...75...96..104..107... Examples: 12=8+3+1=F(6)+F(4)+F(2), zero odds, so 12 is in row 0. 28=21+5+2=F(8)+F(5)+F(3), two odds, so 28 is in row 2. MATHEMATICA f[n_] := Module[{i = Ceiling[Log[GoldenRatio, Sqrt[5]*n]], v = {}, m = n}, While[i > 1, If[Fibonacci[i] <= m, AppendTo[v, 1]; m -= Fibonacci[i], If[v != {}, AppendTo[v, 0]]]; i--]; Total[Reverse[v][[1 ;; -1 ;; 2]]]]; T = GatherBy[SortBy[ Range[10^4], f], f]; Table[Table[T[[n - k + 1, k]], {k, n, 1, -1}], {n, 1, Length[T]}] // Flatten (* Amiram Eldar, Feb 04 2020 *) CROSSREFS Cf. A165276, A165277, A165278. Sequence in context: A182187 A163241 A234027 * A125060 A039882 A326357 Adjacent sequences:  A165276 A165277 A165278 * A165280 A165281 A165282 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Sep 13 2009 EXTENSIONS More terms from Amiram Eldar, Feb 04 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 23 06:42 EST 2020. Contains 332159 sequences. (Running on oeis4.)