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A251547 A251546(n)/2. 2
1, 2, 2, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 12, 12, 15, 15, 15, 15, 15, 15, 19, 19, 20, 20, 20, 20, 20, 20, 20, 23, 23, 23, 23, 23, 23, 23, 23, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

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.

PROG

(Haskell)

a251547 = flip div 2 . a251546  -- Reinhard Zumkeller, Dec 19 2014

CROSSREFS

Cf. A098550, A247253, A251416, A251417, A251546-A251552.

Sequence in context: A156081 A105047 A089881 * A084320 A161358 A120699

Adjacent sequences:  A251544 A251545 A251546 * A251548 A251549 A251550

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 18 2014

STATUS

approved

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Last modified April 25 14:21 EDT 2017. Contains 285414 sequences.