A105588 - OEIS

%I #9 Sep 02 2024 00:20:26

%S 1,1,2,2,2,2,3,3,4,3,4,4,5,5,5,5,7,7,7,7,9,8,9,8,11,9,10,9,11,10,10,

%T 10,13,12,13,12,17,14,14,14,18,16,16,17,20,17,16,16,21,18,17,17,23,20,

%U 20,18,24,22,23,21,26,23,23,22,27,24,24,24,30,25,26,24,34,27,28,26,33,28

%N Diagonal sums of a Moebius-binomial triangle.

%C Diagonal sums of A105586.

%F a(n) = Sum_{k=0..floor(n/2)} binomial(abs(mu(n-k)), abs(mu(k))).

%Y Cf. A008683, A105586.

%K easy,nonn

%O 0,3

%A _Paul Barry_, Apr 14 2005