2,2

Ivan Neretin, Table of n, a(n) for n = 2..10000

Join[{0}, Table[Total[FactorInteger[Binomial[2 n, n - 2]][[All, 2]]], {n, 3, 80}]] (* Ivan Neretin, Nov 02 2017 *)

Sequence in context: A123274 A214674 A185332 * A102149 A321782 A104204

Adjacent sequences: A023815 A023816 A023817 * A023819 A023820 A023821

nonn

Clark Kimberling

Offset corrected to 2 by Ivan Neretin, Nov 02 2017

approved