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 A037593 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,3. 0
 1, 7, 52, 365, 2555, 17888, 125217, 876519, 6135636, 42949453, 300646171, 2104523200, 14731662401, 103121636807, 721851457652, 5052960203565, 35370721424955, 247595049974688, 1733165349822817 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..19. Index entries for linear recurrences with constant coefficients, signature (7,0,1,-7). FORMULA G.f.: x*(1+3*x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015 a(n) = 7*a(n-1) + a(n-3) - 7*a(n-4). - Wesley Ivan Hurt, Sep 04 2022 MATHEMATICA Table[FromDigits[PadRight[{}, n, {1, 0, 3}], 7], {n, 20}] (* Harvey P. Dale, Dec 24 2018 *) CROSSREFS Sequence in context: A027542 A254946 A258845 * A037684 A246513 A015559 Adjacent sequences: A037590 A037591 A037592 * A037594 A037595 A037596 KEYWORD nonn,base,easy AUTHOR Clark Kimberling STATUS approved

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Last modified September 26 08:38 EDT 2023. Contains 365654 sequences. (Running on oeis4.)