A251540 Odd numbers k such that A098548(k) is not a multiple of 3.

1, 493, 495, 497, 499, 1085, 1087, 1685, 1687, 2283, 2285, 2287, 2873, 2875, 3471, 3473, 4673, 4675, 5271, 5273, 5871, 5873, 6469, 6471, 7069, 7071, 7669, 7671, 8267, 8269, 8271, 8273, 8859, 8861, 9457, 9459

Offset: 1

Author

N. J. A. Sloane, Dec 07 2014

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A098548, A001651, A011655.

Programs

Haskell

a251540 n = a251540_list !! (n-1)
a251540_list = filter ((> 0) . flip mod 3 . a098548) [1, 3 ..]
-- Reinhard Zumkeller, Dec 08 2014