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Search: id:A027220
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A027220 a(n) = Sum{(k+1)*T(n,n-k), 0<=k<=n, T given by A026736. +0
1
1, 3, 8, 20, 52, 121, 301, 675, 1628, 3570, 8426, 18202, 42288, 90374, 207464, 439800, 1000194, 2106961, 4755715, 9967599, 22359788, 46670273, 104154703, 216643945, 481381746, 998346275, 2210037191, 4571884119, 10088030640 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A101893 A140662 A077997 this_sequence A026995 A018035 A122228

Adjacent sequences: A027217 A027218 A027219 this_sequence A027221 A027222 A027223

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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