login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A169897 Number of distinct numbers i in the range 1 <= i <= n such that there is a number j in the range 1 <= j <= n for which the carryless product i*j equals n. 0

%I #7 Mar 30 2012 17:38:11

%S 1,2,2,3,3,5,2,7,4,2,2,2,2,2,2,2,2,2,2,6,2,6,2,6,2,7,2,7,2,4,4,4,4,4,

%T 4,4,4,4,4,13,4,13,4,13,4,14,4,14,4,26,2,2,4,4,28,6,6,8,8,22,6,22,6,

%U 22,6,23,6,23,6,12,12,12,12,12,12,12,12,12,12,29,8,29,8,29,8,30,8,30,8,16,16

%N Number of distinct numbers i in the range 1 <= i <= n such that there is a number j in the range 1 <= j <= n for which the carryless product i*j equals n.

%C Counted without multiplicity.

%H <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a>

%Y Cf. A000005, A169891-A169899.

%K nonn,base

%O 1,2

%A _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 11 2010

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)