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A047021 Sum{T(i,n-i): i=0,1,...,n}, array T given by A047020. +0
1
1, 2, 3, 5, 9, 18, 28, 53, 101, 195, 390, 704, 1371, 2676, 5253, 10506, 19840, 39056, 76968, 152168, 304336, 586864, 1161577, 2300544, 4565558, 9131116, 7813324, 35369544, 70256203, 139745471, 279490942, 549138068, 1092533184 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A014227 A064769 A119002 this_sequence A047031 A056766 A080091

Adjacent sequences: A047018 A047019 A047020 this_sequence A047022 A047023 A047024

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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