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Max{m: A098666(n,k)=1 for 1<=k<=m<=n}.
1

%I #3 Mar 30 2012 18:50:47

%S 1,1,1,2,2,4,4,4,4,6,6,6,6,8,10,10,10,10,10,10,10,12,12,12,12,16,16,

%T 16,16,16,16,16,16,18,18,18,18,22,22,22,22,22,22,22,22,28,28,28,28,28,

%U 28,28,28,28,28,28,28,30,30,30,30,36,36,36,36,36,36,36,36,36,36,36,36,40

%N Max{m: A098666(n,k)=1 for 1<=k<=m<=n}.

%C A098666(n,k)=1 for k<=a(n), A098666(n,a(n)+1)>1 for n>1.

%K nonn

%O 1,4

%A _Reinhard Zumkeller_, Sep 20 2004