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Search: id:A081868
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A081868 Numbers n such that sum(k=1,n,C(2k,k) mod 3) is even. +0
1
1, 2, 3, 10, 11, 28, 29, 36, 37, 38, 39, 82, 83, 90, 91, 92, 93, 108, 109, 110, 111, 118, 119, 244, 245, 252, 253, 254, 255, 270, 271, 272, 273, 280, 281, 324, 325, 326, 327, 334, 335, 352, 353, 360, 361, 362, 363 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Adjacent sequences: A081865 A081866 A081867 this_sequence A081869 A081870 A081871

Sequence in context: A032804 A047473 A008509 this_sequence A092986 A006092 A015859

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 12 2003

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.


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