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A047047 T(n,n+2), array T as in A047040; T(n+2,n), array T given by A047050. 0
1, 3, 9, 28, 90, 311, 1099, 3928, 14151, 52025, 193192, 721507, 2704857, 10219356, 38814183, 147936398, 565229232, 2167575626, 8337587694, 32144302453, 124143606307, 480449680735, 1862906012700, 7234641087486, 28131953989641 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

CROSSREFS

Sequence in context: A000245 A143739 A189940 * A071744 A071748 A071752

Adjacent sequences:  A047044 A047045 A047046 * A047048 A047049 A047050

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 22 07:53 EST 2018. Contains 299447 sequences. (Running on oeis4.)