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A027045 a(n) = T(n,n+1) + T(n,n+2) + ... + T(n,2n), T given by A027023. 1
1, 4, 11, 34, 103, 306, 901, 2636, 7685, 22372, 65111, 189590, 552547, 1612154, 4709369, 13773368, 40329465, 118217992, 346891115, 1018872626, 2995250535, 8812601062, 25948130525, 76456539156, 225427875325, 665066293480 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A144791 A180305 A060925 * A006765 A151272 A112272

Adjacent sequences:  A027042 A027043 A027044 * A027046 A027047 A027048

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 17 19:07 EST 2012. Contains 206085 sequences.