%I A060816
%S A060816 1,2,7,22,67,202,607,1822,5467,16402,49207,147622,442867,1328602,
%T A060816 3985807,11957422,35872267,107616802,322850407,968551222,2905653667,
%U A060816 8716961002,26150883007,78452649022,235357947067,706073841202
%N A060816 a(n)=3*a(n-1) + 1; a(0)=1, a(1)=2.
%C A060816 From Erich Friedman's math magic page 2nd paragraph under "Answers" section.
%C A060816 Except for the first term, a(n)=3*a(n-1)+1 (with a(1)=2) [From Vincenzo 
               Librandi (vincenzo.librandi(AT)tin.it), Oct 29 2009]
%H A060816 Harry J. Smith, <a href="b060816.txt">Table of n, a(n) for n=0,...,200</
               a>
%H A060816 Erich Friedman, <a href="http://www.stetson.edu/~efriedma/mathmagic/1000.html">
               Math. Magic</a>
%F A060816 For n>0: a(n) = (5*3^(n-1)-1)/2 = a(n-1)+5*3^(n-2) = (5*A003462(n)+1)/
               3 = a(n-1)+A005030(n-2) - Henry Bottomley (se16(AT)btinternet.com), 
               May 01 2001
%o A060816 (PARI) { for (n=0, 200, if (n>1, a1=a=3*a1 + 1, if (n==0, a=1, a1=a=2)); 
               write("b060816.txt", n, " ", a); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Jul 13 2009]
%Y A060816 Equals A057198 - 1.
%Y A060816 Sequence in context: A084264 A088211 A071684 this_sequence A037552 A094618 
               A077833
%Y A060816 Adjacent sequences: A060813 A060814 A060815 this_sequence A060817 A060818 
               A060819
%K A060816 easy,nonn
%O A060816 0,2
%A A060816 Jason Earls (zevi_35711(AT)yahoo.com), Apr 29 2001