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A091822 a(n)=2*sum(k=0,n,sum(i=0,k,sum(j=0,i, A010060(j))))-(1/6)*(n^3+6*n^2+11*n-6). 0

%I #6 Mar 30 2012 18:39:22

%S 0,0,0,1,2,2,2,3,4,4,4,3,2,2,2,3,4,4,4,3,2,2,2,1,0,0,0,1,2,2,2,3,4,4,

%T 4,3,2,2,2,1,0,0,0,1,2,2,2,1,0,0,0,1,2,2,2,3,4,4,4,3,2,2,2,3,4,4,4,3,

%U 2,2,2,1,0,0,0,1,2,2,2,1,0,0,0,1,2,2,2,3,4,4,4,3,2,2,2,1,0,0,0,1

%N a(n)=2*sum(k=0,n,sum(i=0,k,sum(j=0,i, A010060(j))))-(1/6)*(n^3+6*n^2+11*n-6).

%F a(4n+1)=a(4n+2)=a(4n+3)=2*A076826(n); a(8n)=a(8n+4)=2*A010060(n)+1

%K nonn

%O 1,5

%A _Benoit Cloitre_, Mar 08 2004

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