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Search: id:A026689
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A026689 a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026681. +0
1
1, 1, 4, 6, 18, 27, 82, 138, 390, 644, 1837, 3242, 8835, 15271, 42086, 76403, 203377, 361636, 974089, 1802727, 4718991, 8559441, 22673687, 42562209, 110006420, 202537249, 529643894, 1005279834, 2572145945, 4791823354 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A026686 A026687 A026688 this_sequence A026690 A026691 A026692

Sequence in context: A120391 A064217 A026623 this_sequence A138276 A088810 A005199

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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