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A027986 Sum{T(n,k)*T(n,k+2)}, 0<=k<=2n-2, T given by A027960. +0
1
20, 100, 420, 1694, 6746, 26735, 105722, 417613, 1648692, 6507197, 25681362, 101359219, 400094756, 1579568360, 6237401648, 24635828774, 97327071806, 384596629610, 1520138671688, 6009885957464, 23765835521966, 94003008751940 (list; graph; listen)
OFFSET

2,1
CROSSREFS

Sequence in context: A157429 A128676 A039455 this_sequence A041772 A043462 A044271

Adjacent sequences: A027983 A027984 A027985 this_sequence A027987 A027988 A027989

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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