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A068013 Number of subsets of {1,2,3,...,n} that sum to 0 mod 7. +0
2
1, 1, 1, 1, 3, 5, 10, 20, 38, 74, 146, 294, 586, 1172, 2344, 4684, 9364, 18724, 37452, 74900, 149800, 299600, 599192, 1198376, 2396744, 4793496, 9586984, 19173968, 38347936, 76695856, 153391696, 306783376, 613566768, 1227133520, 2454267040 (list; graph; listen)
OFFSET

0,5

CROSSREFS

7th row of A068009.

Sequence in context: A117591 A003055 A018101 this_sequence A018104 A134365 A076862

Adjacent sequences: A068010 A068011 A068012 this_sequence A068014 A068015 A068016

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 11 2002

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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