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A026892 T(2n,n-4), T given by A026780. 0
1, 19, 220, 2021, 16246, 119914, 835080, 5579147, 36150820, 228879616, 1423367610, 8727874180, 52919787978, 317969615146, 1896431659490, 11241964305405, 66305996581006, 389432443869294, 2279159225280808 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..22.

CROSSREFS

Sequence in context: A220978 A009474 A045492 * A142487 A022743 A087607

Adjacent sequences:  A026889 A026890 A026891 * A026893 A026894 A026895

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 21 01:46 EDT 2021. Contains 347596 sequences. (Running on oeis4.)