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 A291778 a(n) = 2^floor(2*n/3). 5
 1, 1, 2, 4, 4, 8, 16, 16, 32, 64, 64, 128, 256, 256, 512, 1024, 1024, 2048, 4096, 4096, 8192, 16384, 16384, 32768, 65536, 65536, 131072, 262144, 262144, 524288, 1048576, 1048576, 2097152, 4194304, 4194304, 8388608, 16777216, 16777216, 33554432, 67108864, 67108864 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Robert Israel, Table of n, a(n) for n = 0..4978 Index entries for linear recurrences with constant coefficients, signature (0,0,4). FORMULA a(n) = 2^A004523(n). G.f.: (1+x+2*x^2)/(1-4*x^3). - Robert Israel, Sep 01 2017 MAPLE seq(2^floor(2*n/3), n=0..100); # Robert Israel, Sep 01 2017 MATHEMATICA LinearRecurrence[{0, 0, 4}, {1, 1, 2}, 41] (* Jean-François Alcover, Apr 02 2019 *) CROSSREFS Cf. A004523, A291779. Sequence in context: A227594 A321241 A290128 * A089887 A161816 A240347 Adjacent sequences:  A291775 A291776 A291777 * A291779 A291780 A291781 KEYWORD nonn AUTHOR Don Reble and N. J. A. Sloane, Aug 31 2017 STATUS approved

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Last modified July 31 02:33 EDT 2021. Contains 346367 sequences. (Running on oeis4.)