A127507 Triangle read by rows: T(n,k) = mu(n) where 1<=k<=n and mu=A008683.

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

Offset

1,1

Comments

Row sums are A055615(n).

Links

Table of n, a(n) for n=1..55.

Formula

T = M * Q, as infinite lower triangular matrices; M = mu(n) in the main diagonal and the rest zeros, Q = (1; 1, 1; 1, 1, 1;...).

Example

First few rows of the triangle are:
1;
-1, -1;
-1, -1, -1;
0, 0, 0, 0;
-1, -1, -1, -1, -1;
1, 1, 1, 1, 1, 1;
...

Crossrefs

Cf. A008683, A055615.

Sequence in context: A071041 A082551 A152614 * A204441 A127244 A127247

Adjacent sequences: A127504 A127505 A127506 * A127508 A127509 A127510

Keyword

tabl,easy,sign

Author

Gary W. Adamson, Jan 17 2007

Status

approved