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Search: id:A027224
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A027224 a(n) = Sum{T(n,k)*T(n,k+1), 0<=k<=n-1, T given by A026747. +0
1
1, 6, 24, 132, 500, 2728, 10324, 56651, 215323, 1191987, 4549786, 25420734, 97369588, 548884043, 2108335364, 11983465575, 46136052623, 264215445322 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A060249 A052557 A052170 this_sequence A110707 A047712 A126267

Adjacent sequences: A027221 A027222 A027223 this_sequence A027225 A027226 A027227

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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