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A127636
Hankel transform of C(3n,n), A005809.
1
1, 6, 99, 4590, 601749, 223671780, 236051526780, 707876792166456, 6035175245831686020, 146337688589606021286324, 10094030504239191283895044707, 1981045079056219549583047340549844
OFFSET
0,2
FORMULA
a(n)=3^n*A051255(n).
CROSSREFS
Sequence in context: A360336 A192667 A360339 * A281502 A226413 A226344
KEYWORD
nonn
AUTHOR
Paul Barry, Jan 21 2007
STATUS
approved