A023843 - OEIS

%I #6 Nov 08 2017 16:53:55

%S 2,5,4,7,7,10,8,11,9,12,12,15,15,15,14,17,15,18,15,21,19,20,18,22,19,

%T 24,24,25,25,27,24,26,25,24,24,28,25,29,27,32,27,33,27,30,34,33,31,33,

%U 32,35,34,40,37,40,38,41,37,42,39,46,42,42,38,40,39,42,38,42,42,43,44,47,44,46,45,48,49

%N Sum of exponents in prime-power factorization of C(5n,n+1).

%H Ivan Neretin, <a href="/A023843/b023843.txt">Table of n, a(n) for n = 1..10000</a>

%t Table[PrimeOmega[Binomial[5 n, n + 1]], {n, 77}] (* _Ivan Neretin_, Nov 08 2017 *)

%K nonn

%O 1,1

%A _Clark Kimberling_