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A027057 (1/2)*T(n,2n-1), T given by A027052. 0
1, 2, 4, 9, 21, 51, 128, 329, 861, 2285, 6132, 16606, 45313, 124446, 343680, 953753, 2658133, 7436541, 20875972, 58783892, 165989825, 469903672, 1333359488, 3791535934, 10802911297, 30836181436, 88169413364, 252500533673 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..29.

CROSSREFS

Sequence in context: A086246 A247100 A230556 * A148071 A000636 A204352

Adjacent sequences:  A027054 A027055 A027056 * A027058 A027059 A027060

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 20 23:39 EDT 2018. Contains 316405 sequences. (Running on oeis4.)