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A025571 a(n) = T(3n,n), where T is the array defined in A025564. 0
1, 3, 19, 140, 1090, 8749, 71604, 593997, 4976785, 42016975, 356879250, 3046096983, 26105109424, 224485080580, 1936029865870, 16738879226139, 145041018993018, 1259189426140919, 10950454909118725, 95374995078513150, 831822673255797630, 7263789225782699928 (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: A073515 A074559 A027314 * A221266 A082758 A110525

Adjacent sequences:  A025568 A025569 A025570 * A025572 A025573 A025574

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Sep 07 2019

STATUS

approved

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Last modified January 17 18:00 EST 2020. Contains 330987 sequences. (Running on oeis4.)