OFFSET
2,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 2..10000
MATHEMATICA
Join[{0}, Table[Total[Transpose[FactorInteger[Binomial[3n, n-2]]][[2]]], {n, 3, 80}]] (* Harvey P. Dale, Sep 23 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved