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A171891
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1 and all numbers >= 10.
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1
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1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77
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OFFSET
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1,2
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COMMENTS
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Used to illustrate Besicovitch's density theorem.
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REFERENCES
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H. Halberstam and K. F. Roth, Sequences, Oxford, 1966; see p. 6.
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LINKS
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Table of n, a(n) for n=1..69.
Index entries for linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
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G.f.: x*(1+8*x-8*x^2)/(1-x)^2. - Bruno Berselli, Sep 02 2011
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MATHEMATICA
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Table[n + 8 - 8 Boole[n == 1], {n, 69}] (* or *)
Rest@ CoefficientList[Series[x (1 + 8 x - 8 x^2)/(1 - x)^2, {x, 0, 69}], x] (* Michael De Vlieger, May 03 2017 *)
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PROG
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(PARI) if(n==1, 1, n+9) \\ Charles R Greathouse IV, Sep 02 2011
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CROSSREFS
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Sequence in context: A350494 A168100 A088475 * A328075 A001637 A308407
Adjacent sequences: A171888 A171889 A171890 * A171892 A171893 A171894
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane, Oct 19 2010
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STATUS
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approved
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