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A027148 a(n) = A027144(2n-1, n-1). 0
1, 6, 20, 152, 528, 4416, 15488, 135552, 477440, 4289536, 15144960, 138407936, 489431040, 4526702592, 16024403968, 149528084480, 529747476480, 4977103994880, 17643662213120, 166668216041472, 591119702294528, 5608619676532736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A000387 A145221 A332391 * A095854 A027268 A000388

Adjacent sequences:  A027145 A027146 A027147 * A027149 A027150 A027151

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 30 05:35 EDT 2020. Contains 334712 sequences. (Running on oeis4.)