A105595 - OEIS

%I #5 Nov 28 2014 16:53:38

%S 1,1,3,1,3,3,3,1,3,3,3,3,3,7,3,9,1,3,3,5,5,7,9,3,3,7,9,15,7,13,21,13,

%T 1,1,5,1,3,5,7,11,3,3,7,13,5,11,13,19,3,7,7,7,7,19,9,25,7,13,21,23,15,

%U 27,19,39,1,1,3,1,5,5,3,9,3,5,11,9,9,13,19,21,3,7,7,9,7,15,17,19,7,15,21

%N Row sums of number triangle A105594.

%C Conjecture : all terms are odd.

%F a(n)=sum{k=0..n, mod(sum{j=0..n, abs(mu(binomial(n, j)))*mod(binomial(j, k), 2)}, 2)}

%p A105595 := proc(n)

%p     add(A105594(n,k),k=0..n) ;

%p end proc: # _R. J. Mathar_, Nov 28 2014

%Y Cf. A105596.

%K easy,nonn

%O 0,3

%A _Paul Barry_, Apr 14 2005