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A057165 Addition steps in Recamán's sequence A005132. 9
1, 2, 3, 5, 6, 7, 9, 11, 13, 15, 17, 18, 19, 21, 24, 26, 28, 30, 32, 33, 34, 36, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 66, 67, 69, 71, 73, 75, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 101, 102, 104, 106, 108, 112, 113, 114 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

Nick Hobson, Python program for this sequence

C. L. Mallows, Plot (jpeg) of first 10000 terms of A005132

C. L. Mallows, Plot (postscript) of first 10000 terms of A005132

Index entries for sequences related to Recamán's sequence

PROG

(Haskell)

import Data.Set (Set, singleton, notMember, insert)

a057165 n = a057165_list !! n

a057165_list = r (singleton 0) 1 0 where

   r :: Set Integer -> Integer -> Integer -> [Integer]

   r s n x = if x > n && (x - n) `notMember` s

                then r (insert (x-n) s) (n+1) (x-n)

                else n : r (insert (x+n) s) (n+1) (x+n)

-- Reinhard Zumkeller, Mar 17 2011

CROSSREFS

Cf. A005132, A057166, A057167.

Union of A187921 and A187922.

Sequence in context: A218442 A255057 A106843 * A245395 A023884 A135607

Adjacent sequences:  A057162 A057163 A057164 * A057166 A057167 A057168

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Sep 14 2000

STATUS

approved

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Last modified March 26 07:33 EDT 2017. Contains 284111 sequences.