OFFSET
1,1
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
MATHEMATICA
Table[Total[FactorInteger[Binomial[4 n, 2 n]][[All, 2]]], {n, 77}] (* Ivan Neretin, Oct 26 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved