Search: id:A029898
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%I A029898
%S A029898 1,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,
%T A029898 7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,
%U A029898 8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2,4,8,7,5,1,2
%N A029898 Pitoun's sequence: a(n+1) is digital root of a(0)+...+a(n).
%C A029898 If the initial 1 is omitted, this is 2^n mod 9. - N. J. A. Sloane (njas(AT)research.att.com).
%C A029898 Except for the initial term, also the digital root of 11^n. Except for 
               the initial term, also the decimal expansion of 125/1001. Except 
               for the initial term, also the digital root of 2^n. - Cino Hilliard 
               (hillcino368(AT)gmail.com), Dec 31 2004
%F A029898 a(n) = digital root of 2^(n-1) in base 10 = 2^(n-1) (mod 9). - Olivier 
               Gerard (olivier.gerard(AT)gmail.com), Jun 06 2001
%F A029898 For n>0: a(n+6)=a(n) and a(n)=A007612(n+1)-A007612(n)=A010888(A007612(n)). 
               - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 27 2006
%e A029898 1+1+2+4+8+7+5 = 28 -> 2+8 = 10 -> a(7) = 1.
%o A029898 (Other) sage: [power_mod(2,n,9)for n in xrange(0, 105)] # [From Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Nov 03 2009]
%Y A029898 Sequence in context: A016017 A071571 A153130 this_sequence A021406 A065075 
               A001370
%Y A029898 Adjacent sequences: A029895 A029896 A029897 this_sequence A029899 A029900 
               A029901
%K A029898 base,nonn,nice,new
%O A029898 0,3
%A A029898 Amela2(AT)aol.com
%E A029898 More terms from Cino Hilliard (hillcino368(AT)gmail.com), Dec 31 2004

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