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A064720 A Beatty sequence for 3^i + 3^-i + 1. 3

%I

%S 2,4,6,8,10,12,14,16,18,20,23,25,27,29,31,33,35,37,39,41,44,46,48,50,

%T 52,54,56,58,60,62,65,67,69,71,73,75,77,79,81,83,86,88,90,92,94,96,98,

%U 100,102,104,107,109,111,113,115,117,119,121,123,125,128,130,132,134

%N A Beatty sequence for 3^i + 3^-i + 1.

%C 3^i + 3^-i + 1 ~= 1.90966484565321951005513028719008497... ~= 21/11.

%C Different from A059548, although the sequences agree for about 1400 terms. - _Joshua Zucker_, Apr 25 2007

%H Harry J. Smith, <a href="/A064720/b064720.txt">Table of n, a(n) for n = 1..2000</a>

%t a = Chop[ N[ 3^I + 3^-I +1, 36], 10^-40]; Table[ Floor[n*a/(a-1))], {n, 1, 75} ]

%o (PARI) { default(realprecision, 100); b=real(3^I + 3^-I) + 1; b=b/(b - 1); for (n = 1, 2000, write("b064720.txt", n, " ", floor(n*b)) ) } \\ _Harry J. Smith_, Sep 23 2009

%Y Cf. A064719.

%K easy,nonn

%O 1,1

%A _Robert G. Wilson v_, Oct 13 2001

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Last modified July 31 23:46 EDT 2021. Contains 346377 sequences. (Running on oeis4.)