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Search: id:A027140
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A027140 a(n) = Sum{T(n,k)*T(n,n+k)}, 0<=k<=n, T given by A027113. +0
1
1, 3, 12, 57, 264, 1261, 6141, 30276, 150853, 758145, 3836896, 19534086, 99957904, 513756551, 2650822585, 13724435509, 71275344341, 371177285715, 1937791196448, 10139548682524, 53165765660928, 279301910804937 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A020016 A001277 A106570 this_sequence A110309 A101106 A165310

Adjacent sequences: A027137 A027138 A027139 this_sequence A027141 A027142 A027143

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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