login
This site is supported by donations to The OEIS Foundation.

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A124895 Triangle read by rows, 1<=k<=n: T(n,k) = mu(n^2 + k^2) with mu=A008683. 2
-1, -1, 0, 1, -1, 0, -1, 0, 0, 0, 1, -1, 1, -1, 0, -1, 0, 0, 0, -1, 0, 0, -1, 1, 1, 1, 1, 0, 1, 0, -1, 0, -1, 0, -1, 0, 1, 1, 0, -1, 1, 0, -1, 1, 0, -1, 0, -1, 0, 0, 0, -1, 0, -1, 0, 1, 0, -1, -1, 1, -1, -1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1, 0, -1, -1, 1, 1, 1, 1, 1, -1, 0, -1, -1, -1, 0, -1, 0, 1, 0, 1, 0, 0, 0, -1, 0, -1, 0, 1, 0, 1, -1, 0, -1, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

T(n,k) = A008683(A070216(n,k));

T(n,1)=A124897(1);T(A049533(n),1)<>0; T(A049532(n),1)=0;

T(n,n) = -A000007(n-1);

A124896(n) = Sum(abs(T(n,k)): 1<=k<=n), row sums of absolute values.

LINKS

Table of n, a(n) for n=1..111.

CROSSREFS

Sequence in context: A157926 A131377 A077049 * A089885 A143242 A136442

Adjacent sequences:  A124892 A124893 A124894 * A124896 A124897 A124898

KEYWORD

sign,tabl

AUTHOR

Reinhard Zumkeller, Nov 12 2006

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified April 23 17:46 EDT 2014. Contains 240946 sequences.