This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A064719 #14 Jun 03 2025 01:10:01
%S A064719 1,3,5,7,9,11,13,15,17,19,21,22,24,26,28,30,32,34,36,38,40,42,43,45,
%T A064719 47,49,51,53,55,57,59,61,63,64,66,68,70,72,74,76,78,80,82,84,85,87,89,
%U A064719 91,93,95,97,99,101,103,105,106,108,110,112,114,116,118,120,122,124,126
%N A064719 A Beatty sequence for 3^i + 3^-i + 1.
%C A064719 3^i + 3^-i + 1 ~= 1.90966484565321951005513028719008497... ~= 21/11.
%H A064719 Harry J. Smith, <a href="/A064719/b064719.txt">Table of n, a(n) for n = 1..2000</a>
%t A064719 a = Chop[ N[ 3^I + 3^-I +1, 36], 10^-40]; Table[ Floor[n*a], {n, 1, 75} ]
%o A064719 (PARI) { default(realprecision, 100); b=real(3^I + 3^-I) + 1; for (n = 1, 2000, write("b064719.txt", n, " ", floor(n*b)) ) } \\ _Harry J. Smith_, Sep 23 2009
%Y A064719 Cf. A064720.
%Y A064719 Cf. A059547. - _R. J. Mathar_, Oct 02 2008
%K A064719 easy,nonn
%O A064719 1,2
%A A064719 _Robert G. Wilson v_, Oct 13 2001