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A026952 Sum{T(n,k)*T(n,k+1)}, 0<=k<=n-1, T given by A026386. +0
1
1, 4, 24, 90, 541, 2032, 12275, 46472, 282003, 1075404, 6549906, 25125114, 153481299, 591529776, 3622111560, 14013307170, 85975792075, 333669151420 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A026694 A026967 A026977 this_sequence A009769 A119878 A054603

Adjacent sequences: A026949 A026950 A026951 this_sequence A026953 A026954 A026955

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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

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