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A026749 T(2n,n-1), T given by A026747. 2
1, 6, 30, 143, 671, 3132, 14601, 68101, 318035, 1487661, 6971222, 32727472, 153926409, 725264305, 3423262180, 16185240446, 76648901377, 363557014067, 1726994886004, 8215502584008, 39135887682617, 186676023857041, 891557875400175 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..23.

CROSSREFS

Sequence in context: A199938 A285195 A307321 * A003279 A221397 A082134

Adjacent sequences:  A026746 A026747 A026748 * A026750 A026751 A026752

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 25 21:43 EDT 2019. Contains 324357 sequences. (Running on oeis4.)