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 #7 Mar 05 2021 21:44:55
%S 1,5,3,13,17,7,25,29,11,37,41,15,49,53,19,61,65,23,73,77,27,85,89,31,
%T 97,101,35,109,113,39,121,125,43,133,137,47,145,149,51,157,161,55,169,
%U 173,59,181,185,63,193,197,67,205,209,71,217,221,75,229,233,79,241
%N Numerator of (4n-3)/A000265(n). Numerator of pairwise quotients of A004130.
%C Terms are a rearrangement of the odd numbers not of form 12k+9.
%C Also given by the following linear quasi-polynomial mod 3: (4 n - 3) If[Mod[n, 3] == 0, 1/3, 1]. [From _Eric Rowland_, Feb 24 2009]
%H Michael De Vlieger, <a href="/A093544/b093544.txt">Table of n, a(n) for n = 1..10000</a>
%t Table[(4 n - 3) If[Mod[n, 3] == 0, 1/3, 1], {n, 50}] [From _Eric Rowland_, Feb 24 2009]
%o (PARI) a(n)=numerator((4*n-3)/n*2^valuation(n,2))
%K nonn
%O 1,2
%A _Ralf Stephan_, Mar 31 2004