Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%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