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A026073 T(2n,n), where T is the array defined in A024996. 0
1, 2, 5, 24, 133, 736, 4135, 23452, 134043, 770864, 4455462, 25859380, 150615223, 879876040, 5153445895, 30251941860, 177938418225, 1048452751872, 6187400646130, 36566048896896, 216370786646054 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

CROSSREFS

Bisection of A026078.

Sequence in context: A194349 A208969 A020022 * A054131 A086635 A020124

Adjacent sequences:  A026070 A026071 A026072 * A026074 A026075 A026076

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 25 00:01 EDT 2020. Contains 338010 sequences. (Running on oeis4.)