A023980 - OEIS

%I #3 Mar 30 2012 18:55:53

%S 3,5,8,9,11,12,17,15,17,18,20,20,24,25,26,24,27,26,30,29,32,34,37,35,

%T 37,37,37,36,39,40,44,40,41,45,45,43,48,48,51,48,51,51,56,56,55,56,60,

%U 57,59,57,59,60,63,61,63,60,63,65,68,65,71,74,73,68,69,69,73,71,75,75,77,74,78,79,81,81

%N Sum of exponents in prime-power factorization of multinomial coefficient M(4n;2n,n,n).

%K nonn

%O 1,1

%A _Clark Kimberling_