A023840 - OEIS

%I #6 Nov 08 2017 18:04:23

%S 0,3,5,5,7,8,8,11,11,10,12,14,13,14,16,16,14,18,17,17,18,18,19,25,23,

%T 23,25,24,23,24,23,26,24,24,25,26,27,27,28,29,25,30,32,31,31,30,33,36,

%U 33,37,38,38,39,40,36,40,39,39,39,41,38,39,43,42,37,38,41,42,44,43,43,45,43,46,50,48,49

%N Sum of exponents in prime-power factorization of C(5n,n-3).

%H Ivan Neretin, <a href="/A023840/b023840.txt">Table of n, a(n) for n = 3..10000</a>

%t Table[PrimeOmega[Binomial[5 n, n - 3]], {n, 3, 79}] (* _Ivan Neretin_, Nov 08 2017 *)

%K nonn

%O 3,2

%A _Clark Kimberling_

%E Offset corrected to 3 by _Ivan Neretin_, Nov 08 2017