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A244198 Number of ballot sequences of length n having largest descent 2. 2
1, 5, 21, 78, 292, 1028, 3691, 13004, 46452, 165098, 595386, 2148830, 7861261, 28880866, 107407411, 401862116, 1520528499, 5791624015, 22288596981, 86362655462, 337798945830, 1330195410257, 5283145735982, 21119637660235, 85089563602538, 344934335418331 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

COMMENTS

Also number of ballot sequences of length n having largest ascent 2.

LINKS

Table of n, a(n) for n=4..29.

CROSSREFS

Column k=2 of A238128 and of A238129.

Sequence in context: A055219 A108863 A027172 * A186244 A255447 A029870

Adjacent sequences:  A244195 A244196 A244197 * A244199 A244200 A244201

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Jun 22 2014

STATUS

approved

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Last modified June 5 01:27 EDT 2020. Contains 334828 sequences. (Running on oeis4.)