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A054141 T(2n-1,n), array T as in A054134. 0
2, 6, 31, 180, 1101, 6901, 43828, 280664, 1807909, 11698479, 75973701, 494890116, 3231949644, 21153128028, 138712184488 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Sequence in context: A058028 A216834 A287592 * A007710 A275558 A094639

Adjacent sequences:  A054138 A054139 A054140 * A054142 A054143 A054144

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 23 21:41 EDT 2018. Contains 316541 sequences. (Running on oeis4.)