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A252838 Let A098550(n) be prime. If A098550(n+1) is even, then suppose A098550(n+3), A098550(n+5), ..., A098550(n+(2*r-1)) are also even, while A098550(n+(2*r+1)) is odd. Then a(n)= A098550(n+(2*r-1))/2; if A098550(n+1) is odd, then a(n)=0. 1
0, 11, 11, 11, 0, 0, 19, 31, 31, 0, 37, 43, 0, 47, 53, 59, 61, 71, 71, 73, 79, 89, 89, 101, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
See comment in A252837.
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, 2015 and J. Int. Seq. 18 (2015) 15.6.7.
FORMULA
If conjecture in A252837 is true, then for n>=25, a(n) = prime(n+1).
CROSSREFS
Sequence in context: A126610 A087380 A152986 * A366717 A212541 A087994
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, Dec 22 2014
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)