login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046733 Periods for divisibility of A000213 by n. 0
1, 1, 13, 1, 31, 1, 16, 1, 13, 1, 110, 1, 56, 1, 403, 1, 96, 1, 120, 1, 208, 1, 553, 1, 31, 1, 1, 1, 140, 1, 331, 1, 1430, 1, 496, 1, 469, 1, 728, 1, 560, 1, 308, 1, 403, 1, 46, 1, 112, 1, 1248, 1, 52, 1, 3410, 1, 1560, 1, 3541, 1, 620, 1, 208, 1, 1736, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

If a(n) > 1, then n divides A000213(t + k * a(n)) for some specific value of t and all nonnegative integers k. a(n)=1, n > 1, implies there is no solution. - Sean A. Irvine, Apr 19 2021

LINKS

Table of n, a(n) for n=1..66.

FORMULA

a(2*n) = 1. - Sean A. Irvine, Apr 19 2021

More generally, a(k*m) = 1 for m in A046735 and all k >= 1. - Sean A. Irvine, Apr 19 2021

CROSSREFS

Cf. A000213.

Sequence in context: A040181 A123187 A272797 * A291449 A278345 A277866

Adjacent sequences:  A046730 A046731 A046732 * A046734 A046735 A046736

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

a(25) corrected by Sean A. Irvine, Apr 19 2021

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 24 02:56 EDT 2021. Contains 345415 sequences. (Running on oeis4.)