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 A215020 a(n) = log_2( A182105(n) ). 4
 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 4, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 4, 5, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 4, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 0, 0, 1, 2, 3, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,7 COMMENTS Apparently the leftmost positions of change with incrementing skew-binary numbers (A169683), see example. - Joerg Arndt, May 27 2016 Irregular table read by rows, where the k-th row counts from 0 up to the ruler function of k, A007814(k). - Allan C. Wechsler, Sep 26 2019 LINKS Wikipedia, Skew binary number system FORMULA a(n) = A082850(n) - 1. - Omar E. Pol, Jun 18 2019 EXAMPLE From Joerg Arndt, May 27 2016: (Start) The first nonnegative skew-binary numbers (dots denote zeros) are n :  [skew-binary]  position of change 00:  [ . . . . . ]  - 01:  [ . . . . 1 ]  0 02:  [ . . . . 2 ]  0 03:  [ . . . 1 . ]  1 04:  [ . . . 1 1 ]  0 05:  [ . . . 1 2 ]  0 06:  [ . . . 2 . ]  1 07:  [ . . 1 . . ]  2 08:  [ . . 1 . 1 ]  0 09:  [ . . 1 . 2 ]  0 10:  [ . . 1 1 . ]  1 11:  [ . . 1 1 1 ]  0 12:  [ . . 1 1 2 ]  0 13:  [ . . 1 2 . ]  1 14:  [ . . 2 . . ]  2 15:  [ . 1 . . . ]  3 16:  [ . 1 . . 1 ]  0 17:  [ . 1 . . 2 ]  0 18:  [ . 1 . 1 . ]  1 19:  [ . 1 . 1 1 ]  0 20:  [ . 1 . 1 2 ]  0 21:  [ . 1 . 2 . ]  1 22:  [ . 1 1 . . ]  2 23:  [ . 1 1 . 1 ]  0 24:  [ . 1 1 . 2 ]  0 25:  [ . 1 1 1 . ]  1 26:  [ . 1 1 1 1 ]  0 27:  [ . 1 1 1 2 ]  0 28:  [ . 1 1 2 . ]  1 29:  [ . 1 2 . . ]  2 30:  [ . 2 . . . ]  3 31:  [ 1 . . . . ]  4 32:  [ 1 . . . 1 ]  0 33:  [ 1 . . . 2 ]  0 ... (End) From Allan C. Wechsler, Sep 27 2019 (Start) First few rows of irregular table derived from A007814 (see comments). 0 0 1 0 0 1 2 0 0 1 0 0 1 2 3 0 0 1 ... (End) CROSSREFS Cf. A182105, A082850, A007814. Sequence in context: A330005 A165277 A245194 * A103612 A083913 A023670 Adjacent sequences:  A215017 A215018 A215019 * A215021 A215022 A215023 KEYWORD nonn AUTHOR N. J. A. Sloane, Aug 01 2012 STATUS approved

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Last modified June 24 18:46 EDT 2021. Contains 345419 sequences. (Running on oeis4.)