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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

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 November 22 16:20 EST 2014. Contains 249807 sequences.