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Search: id:A027129
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A027129 a(n) = T(n,n) + T(n,n+1) + ... + T(n,2n), T given by A027113. +0
1
1, 3, 9, 27, 79, 231, 672, 1951, 5662, 16439, 47776, 139025, 405110, 1182107, 3454035, 10105373, 29600389, 86800887, 254797772, 748646741, 2201587214, 6479524339, 19084115993, 56246912653, 165882843095, 489509315203 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Adjacent sequences: A027126 A027127 A027128 this_sequence A027130 A027131 A027132

Sequence in context: A090401 A113041 A026289 this_sequence A077844 A077827 A129770

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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