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A202341 Numbers occurring exactly once in Hofstadter H-sequence A005374. 4
0, 2, 3, 6, 8, 9, 11, 12, 15, 16, 19, 21, 22, 25, 27, 28, 30, 31, 34, 36, 37, 39, 40, 43, 44, 47, 49, 50, 52, 53, 56, 57, 60, 62, 63, 66, 68, 69, 71, 72, 75, 76, 79, 81, 82, 85, 87, 88, 90, 91, 94, 96, 97, 99, 100, 103, 104, 107, 109, 110, 113, 115, 116, 118 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A202340(a(n)) = 1.

LINKS

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

Eric Weisstein's World of Mathematics, Hofstadter H-Sequence.

Wikipedia, Hofstadter sequence

Index entries for Hofstadter-type sequences

PROG

(Haskell)

import Data.List (elemIndices)

a202341 n = a202341_list !! (n-1)

a202341_list = elemIndices 1 a202340_list

CROSSREFS

Cf. A005374, A202340, A202342 (complement).

Sequence in context: A344166 A201822 A093510 * A013948 A187478 A269860

Adjacent sequences:  A202338 A202339 A202340 * A202342 A202343 A202344

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 17 2011

STATUS

approved

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Last modified June 19 00:04 EDT 2021. Contains 345125 sequences. (Running on oeis4.)