OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
MATHEMATICA
Join[{0}, Rest[Total[Last[Transpose[FactorInteger[#]]]]&/@(Binomial[ 4#, 2#-2]&/@Range[80])]] (* Harvey P. Dale, Jun 07 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved