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A088564
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a(n)=sum(i=0,n,binomial(2*i,i) (mod 3)).
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0
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1, 3, 3, 5, 6, 6, 6, 6, 6, 8, 9, 9, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 14, 15, 15, 16, 18, 18, 18, 18, 18, 19, 21, 21, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Distinct values (i.e. 1,3,5,6,8,9,...) are given by the partial sums of the Thue-Morse sequence on alphabet (1,2) A026430. Sequence of least k such that a(k)>a(k-1) is given by A005836. For any k>=0, card{ n : a(3*A005836(k)) =a(n)}=1.
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CROSSREFS
| Cf. A001285, A005836, A006996.
Sequence in context: A204250 A131948 A134636 * A161560 A078796 A201929
Adjacent sequences: A088561 A088562 A088563 * A088565 A088566 A088567
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KEYWORD
| nonn
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AUTHOR
| [Author's name was accidentally deleted], Nov 19, 2003
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EXTENSIONS
| Author was Michael Somos or Benoit Cloitre, I think. Apologies! - N. J. A. Sloane (njas(AT)research.att.com), Jun 13 2004.
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