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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
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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
