A146562 'Erratic' numbers in A064353 [Kolakoski (1,3)]

3, 6, 9, 15, 18, 21, 25, 29, 32, 35, 41, 44, 47, 51, 54, 57, 61, 64, 67, 73, 76, 79, 83, 87, 90, 93, 99, 102, 105, 109, 112, 115, 121, 124, 127, 131, 134, 137, 143, 146, 149, 153, 157, 160, 163, 169, 172, 175, 179, 182, 185, 189, 192, 195, 201, 204, 207, 211

Offset

1,1

Comments

A064353(n) is generally 1 if n is odd and 3 if n is even. An 'erratic' number breaks this rule.

Links

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

Example

A064353(3) is predicted to be 1 but is 3 so 3 is in the list.

Prog

(Haskell)
import Data.List (findIndices)
a146562 n = a146562_list !! (n-1)
a146562_list = map (+ 1) $
   findIndices (/= 0) $ zipWith (-) a064353_list $ cycle [1, 3]
-- Reinhard Zumkeller, Aug 03 2013

Crossrefs

Cf. A064353.

Cf. A010684.

Sequence in context: A373447 A362070 A310175 * A342594 A179893 A274191

Adjacent sequences: A146559 A146560 A146561 * A146563 A146564 A146565

Keyword

nonn

Author

J. Perry (johnandruth(AT)jrperry.orangehome.co.uk), Nov 01 2008

Status

approved