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Search: id:A026781
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A026781 T(2n,n), T given by A026780. +0
1
1, 3, 12, 53, 246, 1178, 5768, 28731, 145108, 741392, 3825418, 19907156, 104370554, 550816506, 2924018194, 15603778253, 83661779470, 450479003038, 2435009205992, 13208558795146, 71879906857596, 392320357251928 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A000256 A124202 A138269 this_sequence A110122 A060460 A120983

Adjacent sequences: A026778 A026779 A026780 this_sequence A026782 A026783 A026784

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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