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!)
A174726 a(n) = (A002033(n-1) - A008683(n))/2 5

%I

%S 0,1,1,1,1,1,1,2,1,1,1,4,1,1,1,4,1,4,1,4,1,1,1,10,1,1,2,4,1,7,1,8,1,1,

%T 1,13,1,1,1,10,1,7,1,4,4,1,1,24,1,4,1,4,1,10,1,10,1,1,1,22,1,1,4,16,1,

%U 7,1,4,1,7,1,38,1,1,4,4,1

%N a(n) = (A002033(n-1) - A008683(n))/2

%C a(n) is the number of permutation matrices with a negative contribution to the determinant that is the Möbius function. See A174725 for how the determinant is defined. - _Mats Granvik_, May 26 2017

%H Mats Granvik, <a href="/A174726/b174726.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = (A002033(n-1) - A008683(n))/2. - _Mats Granvik_, May 26 2017

%Y Cf. A074206, A174725, A008683, A051731.

%K nonn

%O 1,8

%A _Mats Granvik_, Mar 28 2010

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 April 7 11:07 EDT 2020. Contains 333301 sequences. (Running on oeis4.)