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A027118 T(n,2n), T given by A027113. 0
1, 2, 3, 7, 16, 39, 98, 252, 659, 1747, 4682, 12662, 34505, 94644, 261069, 723707, 2014952, 5631875, 15796210, 44444302, 125405217, 354765866, 1006003375, 2858939669, 8141135778, 23225997936, 66376634429, 190000938785 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..27.

CROSSREFS

Sequence in context: A153056 A235112 A081207 * A114582 A107387 A091487

Adjacent sequences:  A027115 A027116 A027117 * A027119 A027120 A027121

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 18 09:57 EST 2019. Contains 320250 sequences. (Running on oeis4.)