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A026899 T(2n+1,n+2), T given by A026780. 0
1, 6, 30, 144, 687, 3296, 15972, 78294, 388320, 1947910, 9875566, 50560246, 261177401, 1360112590, 7134802722, 37673830960, 200106632766, 1068539351340, 5733226876876, 30894846668416, 167137498306038, 907416216735816 (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: A082134 A030192 A026376 * A135160 A276022 A046945

Adjacent sequences:  A026896 A026897 A026898 * A026900 A026901 A026902

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 16 12:38 EDT 2019. Contains 325079 sequences. (Running on oeis4.)