A241666 Gives the value (either 0 or 1) that the trajectory of n under A241663 eventually reaches.

0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1

Offset

0

Comments

a(n) = 1 for n = 1, 5, 25, 29, 125, 145, 149, 625, 725, 745, 841, ... - Alois P. Heinz, Apr 30 2014

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

C. Defant, On Arithmetic Functions Related to Iterates of the Schemmel Totient Functions, J. Int. Seq. 18 (2015) # 15.2.1

Colin Defant, Python program

Index entries for characteristic functions

Formula

a(0) = 0, a(1) = 1, and for n > 1, a(n) = a(A241663(n)). - Antti Karttunen, Nov 05 2017

Example

A241663(A241663(7))=0, so a(7)=0. A241663(A241663(A241663(29)))=1, so a(29)=1.

Prog

(Python) # The link above provides a Python program. Input m=4, as well as starting and ending values of n. The fourth string of numbers will be this sequence.
(Scheme, with memoization-macro definec)
(definec (A241666 n) (if (<= n 1) n (A241666 (A241663 n)))) ;; Antti Karttunen, Nov 05 2017

Crossrefs

Sequence in context: A103588 A153638 A122415 * A324539 A324964 A285957

Adjacent sequences: A241663 A241664 A241665 * A241667 A241668 A241669

Keyword

nonn

Author

Colin Defant, Apr 26 2014

Extensions

Term a(0)=0 prepended and more terms added by Antti Karttunen, Nov 05 2017

Status

approved