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Search: id:A025049
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A025049 Descending wiggly sums: number of sums adding to n in which terms alternately decrease and increase. +0
9
1, 1, 2, 2, 4, 6, 9, 14, 23, 35, 55, 87, 136, 214, 337, 528, 830, 1306, 2051, 3223, 5067, 7962, 12512, 19667, 30908, 48574, 76343, 119982, 188565, 296358, 465764, 732006, 1150447, 1808078, 2841627, 4465992, 7018891, 11031101, 17336823, 27247087 (list; graph; listen)
OFFSET

1,3

FORMULA

a(n) = 1+A025047(n)-A025048(n) = sum_k[A059883(n, k)] - Henry Bottomley (se16(AT)btinternet.com), Feb 05 2001

CROSSREFS

Sequence in context: A047084 A058518 A018139 this_sequence A052012 A018061 A071058

Adjacent sequences: A025046 A025047 A025048 this_sequence A025050 A025051 A025052

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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


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