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!)
A143320 Triangle read by rows, A000012 * A143317; 1<=k<=n. 1

%I #5 Apr 10 2013 15:27:38

%S 1,4,-1,8,-1,-1,15,-4,-1,0,21,-4,-1,0,-1,33,-8,-4,0,-1,1,41,-8,-4,0,

%T -1,1,-1,56,-15,-4,0,-1,1,-1,0,69,-15,-8,0,-1,1,-1,0,0,87,-21,-8,0,-4,

%U 1,-1,0,0,1,99,-21,-8,0,-4,1,-1,0,0,1,-1,127,-33,-15,0,-4,4,-1,0,0,1,-1,0

%N Triangle read by rows, A000012 * A143317; 1<=k<=n.

%C Left border = A024916: (1, 4, 8, 15, 21, 33,...).

%C Right border = mu(n), A008683.

%C Row sums = T(n), triangular numbers.

%F Triangle read by rows, A000012 * A143317; 1<=k<=n

%e First few rows of the triangle =

%e 1;

%e 4, -1;

%e 8, -1, -1

%e 15, -4, -1, 0;

%e 21, -4, -1, 0, -1;

%e 33, -8, -4, 0, -1, 1;

%e 41, -3, -4, 0, -1, 1, -1;

%e ...

%Y Cf. A143317, A008683, A024916.

%K sign,tabl

%O 1,2

%A _Gary W. Adamson_, Aug 07 2008

%E Corrected last few terms. - Stuart Orford (sjorford(AT)gmail.com), Dec 22 2008

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 March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)