%I A023991
%S A023991 1,4,6,8,8,12,12,13,13,15,17,20,19,22,21,22,21,24,25,26,25,31,30,32,30,
               31,
%T A023991 33,33,32,36,34,36,34,36,36,37,36,40,40,42,40,45,48,49,49,51,50,52,49,
               50,50,
%U A023991 53,50,56,53,53,53,55,58,60,59,62,60,60,55,58,59,61,60,65,62,65,63,66,
               69,68
%N A023991 Sum of exponents of primes in multinomial coefficient M(3n; n+1,n,n-1).
%Y A023991 Sequence in context: A027709 A079775 A104173 this_sequence A103189 A083786 
               A165957
%Y A023991 Adjacent sequences: A023988 A023989 A023990 this_sequence A023992 A023993 
               A023994
%K A023991 nonn
%O A023991 1,2
%A A023991 Clark Kimberling (ck6(AT)evansville.edu)