A251559 a(n) = 2 more than the largest odd number among {A098550(1), A098550(2), ..., A098550(n)} which is neither a prime nor a term of A251542.

9, 9, 9, 9, 15, 15, 21, 21, 21, 21, 21, 21, 39, 39, 39, 39, 39, 39, 39, 39, 45, 45, 45, 45, 45, 49, 49, 55, 55, 55, 55, 55, 55, 57, 57, 69, 69, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 99, 99, 105, 105, 105, 105, 121

Offset: 1

Author

N. J. A. Sloane, Dec 23 2014

Keywords

• nonn

Links

• David L. Applegate, Hans Havermann, Bob Selcoe, Vladimir Shevelev, N. J. A. Sloane, and Reinhard Zumkeller, The Yellowstone Permutation, arXiv preprint arXiv:1501.01669 [math.NT], 2015 and J. Int. Seq. 18 (2015) 15.6.7.

Crossrefs

Cf. A098550, A251546, A251557, A251558.