A251540 - OEIS

%I #12 Aug 06 2021 01:52:36

%S 1,493,495,497,499,1085,1087,1685,1687,2283,2285,2287,2873,2875,3471,

%T 3473,4673,4675,5271,5273,5871,5873,6469,6471,7069,7071,7669,7671,

%U 8267,8269,8271,8273,8859,8861,9457,9459

%N Odd numbers k such that A098548(k) is not a multiple of 3.

%H Reinhard Zumkeller, <a href="/A251540/b251540.txt">Table of n, a(n) for n = 1..1000</a>

%o (Haskell)

%o a251540 n = a251540_list !! (n-1)

%o a251540_list = filter ((> 0) . flip mod 3 . a098548) [1, 3 ..]

%o -- _Reinhard Zumkeller_, Dec 08 2014

%Y Cf. A098548, A001651, A011655.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Dec 07 2014