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A047119 T(2n,n), array T as in A047110. 0
1, 2, 9, 44, 250, 1418, 8567, 51635, 321039, 1996724, 12628528, 80011583, 511889348, 3282172599, 21172582733, 136879748346, 888481523846, 5778565689270, 37689416642042, 246245960185175, 1612234572834084 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A246812 A108308 A119855 * A052881 A020071 A248439

Adjacent sequences:  A047116 A047117 A047118 * A047120 A047121 A047122

KEYWORD

nonn

AUTHOR

Clark Kimberling; definition revised Dec 08 2006; sequence corrected Dec 18 2006

STATUS

approved

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Last modified December 3 04:22 EST 2021. Contains 349445 sequences. (Running on oeis4.)