A156241 Triangle read by rows, T(n,k). If k divides n then A008683(n)*A008683(k).

1, -1, 1, -1, 0, 1, 0, 0, 0, 1, -1, 0, 0, 0, 1, 1, -1, -1, 0, 0, 1, -1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, -1, 0, 0, -1, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, -1, 0, 0, 0, 0, -1, 0, 0

Offset: 1

Author

Mats Granvik, Feb 07 2009

Keywords

• sign
• tabl

Comments

A008683 is found in the first column. A087003 appears in the second column.

The definition does not match the values for n=k. Apparently T(n,n) has been set to 1, not mu(n)*mu(n). [From R. J. Mathar, Mar 14 2009]