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 A275163 a(n) = 13*2^(n+1) - 19. 3
 7, 33, 85, 189, 397, 813, 1645, 3309, 6637, 13293, 26605, 53229, 106477, 212973, 425965, 851949, 1703917, 3407853, 6815725, 13631469, 27262957, 54525933, 109051885, 218103789, 436207597, 872415213, 1744830445, 3489660909, 6979321837, 13958643693 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Most terms in even positions of A278066 are terms in this sequence. LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (3,-2). FORMULA a(0) = 7; a(n) = 2*a(n-1) + 19 for n>=1. G.f.: (12*x+7)/((1-2*x)*(1-x)). MATHEMATICA NestList[2#+19&, 7, 30] (* or *) LinearRecurrence[{3, -2}, {7, 33}, 30] (* Harvey P. Dale, Aug 08 2021 *) CROSSREFS Cf. A278066. Sequence in context: A175189 A153286 A060745 * A051895 A168574 A212106 Adjacent sequences: A275160 A275161 A275162 * A275164 A275165 A275166 KEYWORD nonn AUTHOR Nathan Fox, Nov 13 2016 STATUS approved

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Last modified June 7 04:44 EDT 2023. Contains 363151 sequences. (Running on oeis4.)