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A025049 Descending wiggly sums: number of sums adding to n in which terms alternately decrease and increase. 10
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; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..40.

FORMULA

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

EXAMPLE

See A025047.

CROSSREFS

Sequence in context: A058518 A018139 A293640 * A293552 A293546 A052012

Adjacent sequences:  A025046 A025047 A025048 * A025050 A025051 A025052

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified June 20 02:49 EDT 2021. Contains 345154 sequences. (Running on oeis4.)