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A051063
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27*n+9 or 27*n+18.
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2
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9, 18, 36, 45, 63, 72, 90, 99, 117, 126, 144, 153, 171, 180, 198, 207, 225, 234, 252, 261, 279, 288, 306, 315, 333, 342, 360, 369, 387, 396, 414, 423, 441, 450, 468, 477, 495, 504, 522, 531, 549, 558, 576, 585, 603, 612, 630, 639, 657, 666
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OFFSET
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1,1
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REFERENCES
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Letter from Gary W. Adamson concerning Prouhet-Thue-Morse sequence, Nov. 11, 1999.
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LINKS
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FORMULA
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G.f. 9*x*( 1+x+x^2 ) / ( (1+x)*(x-1)^2 ). - R. J. Mathar, Sep 18 2013
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MATHEMATICA
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LinearRecurrence[{1, 1, -1}, {9, 18, 36}, 60] (* Harvey P. Dale, Mar 09 2022 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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