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Search: id:A026559
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A026559 a(n) = T(2n,n-1), T given by A026552. +0
1
1, 3, 12, 45, 180, 721, 2940, 12069, 49935, 207691, 867900, 3640429, 15319395, 64643580, 273431408, 1158988141, 4921651521, 20934115963, 89173404140 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A114515 A151162 A094547 this_sequence A008781 A047013 A108368

Adjacent sequences: A026556 A026557 A026558 this_sequence A026560 A026561 A026562

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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