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a(n) = A016813(A166093(n)).
2

%I #2 Mar 31 2012 13:21:20

%S 1,5,13,21,29,61,105,53,249,133,45,141,101,221,237,173,521,285,197,

%T 117,397,269,297,669,317,341,357,381,585,485,1265,189,2297,461,261,

%U 1597,509,125,629,797,333,1237,325,773,2369,941,549,789,1433,1109

%N a(n) = A016813(A166093(n)).

%C a(n) = the least integer of the form 4i+1, with A166040(i/2) = 2n.

%Y Differs from A166095 for the first time at n=16. See also A166096.

%K nonn

%O 0,2

%A _Antti Karttunen_, Oct 08 2009