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A027087 T(n,2n), T given by A027082. 0
1, 1, 2, 5, 11, 27, 68, 175, 458, 1215, 3258, 8815, 24031, 65937, 181936, 504473, 1404879, 3927495, 11017802, 31004871, 87497297, 247559933, 702089528, 1995483853, 5682959332, 16214622573, 46343364290, 132667706857, 380358924209 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Sequence in context: A006652 A238825 A073225 * A055227 A325916 A257790

Adjacent sequences:  A027084 A027085 A027086 * A027088 A027089 A027090

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 18 05:32 EDT 2019. Contains 327165 sequences. (Running on oeis4.)