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A027074 Sum{T(n,k)*T(n,2n-k)}, 0<=k<=n-1, T given by A027052. +0
1
1, 1, 4, 22, 93, 389, 1570, 6144, 23629, 89551, 335430, 1244762, 4583293, 16765087, 60980096, 220724896, 795540601, 2856541663, 10222762962, 36475315442, 129796579409, 460757642587, 1632012075912, 5768986242408 (list; graph; listen)
OFFSET

1,3
CROSSREFS

Sequence in context: A060453 A038382 A105467 this_sequence A036922 A036926 A079272

Adjacent sequences: A027071 A027072 A027073 this_sequence A027075 A027076 A027077

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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