A117070 Number at start of segment n of A078783.

1, 2, 4, 5, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75

Offset: 1

Author

N. J. A. Sloane, Apr 18 2006

Keywords

• nonn

Comments

a(n) = A078783(3*n-2).

References

• N. J. A. Sloane and Allan Wilks, On sequences of Recaman type, paper in preparation, 2006.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A078783, A117071, A117072.

Programs

Haskell

import Data.List (transpose, unfoldr)
a117070 n = a117070_list !! (n-1)
a117070_list = tSegments !! 0
tSegments = transpose $ unfoldr (Just . splitAt 3) $ tail a078783_list
-- Reinhard Zumkeller, May 01 2015