%I A023831
%S A023831 2,4,4,7,7,8,8,11,11,12,8,12,13,15,13,18,14,18,14,18,20,18,17,21,22,20,
               19,
%T A023831 22,20,24,19,26,24,26,23,28,27,27,27,30,29,31,27,30,30,30,27,34,31,33,
               31,34,
%U A023831 33,33,30,34,33,36,31,37,38,39,37,42,39,41,38,42,43,43,38,46,44,44,44,
               46,46
%N A023831 Sum of exponents in prime-power factorization of C(4n,n+1).
%Y A023831 Sequence in context: A103622 A105774 A130805 this_sequence A023844 A132083 
               A102465
%Y A023831 Adjacent sequences: A023828 A023829 A023830 this_sequence A023832 A023833 
               A023834
%K A023831 nonn
%O A023831 1,1
%A A023831 Clark Kimberling (ck6(AT)evansville.edu)