A251550 a(n) = (A251549(n)-1)/2.

1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 6, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11, 11, 11, 11, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 18, 18, 18, 18, 18

Offset

1,3

Links

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

Prog

(Haskell)
a251550 = flip div 2 . subtract 1 . a251549
-- Reinhard Zumkeller, Dec 19 2014

Crossrefs

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

Sequence in context: A033271 A290792 A279757 * A279221 A357899 A247781

Adjacent sequences: A251547 A251548 A251549 * A251551 A251552 A251553

Keyword

nonn

Author

N. J. A. Sloane, Dec 18 2014

Status

approved