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A027280 a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=2n-3, T given by A026568. 0
26, 164, 1224, 7664, 51488, 326456, 2126376, 13574046, 87554326, 560845908, 3607790136, 23158545126, 148945375022, 957564479960 (list; graph; refs; listen; history; internal format)
OFFSET

3,1

CROSSREFS

Sequence in context: A192289 A042314 A200874 * A006354 A037052 A156339

Adjacent sequences:  A027277 A027278 A027279 * A027281 A027282 A027283

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.