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Search: id:A027248
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A027248 a(n) = Sum{T(n,k)*T(n,k+1), 0<=k<=n-1, T given by A026780. +0
1
1, 6, 29, 156, 741, 3958, 19233, 103340, 513829, 2782642, 14111035, 76987001, 396866211, 2179190558, 11387537287, 62869497136, 332264796115 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A108982 A059724 A000708 this_sequence A020090 A020036 A054748

Adjacent sequences: A027245 A027246 A027247 this_sequence A027249 A027250 A027251

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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