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A105567
Moebius transform of multiplication table, read by antidiagonals.
2
1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, -1, -1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, -1, -1, 0, 0, -1, -1, 1, 1, 1, 0, -1, 0, -1, 0, 1, 1, 1, 0, -1, 0, 0, 0, 0, -1, 0, 1, 1, 0, 0, -1, 0, 0, 0, -1, 0, 0, 1, 1, -1, 0, 0, 0, 1, 1, 0, 0, 0, -1, 1, 1, 1, 0, 0, 0, -1, 0, -1, 0, 0, 0, 1, 1, 1, 0, -1, 1, 0, 0, 1, 1, 0, 0, 1, -1, 0, 1, 1, 1, 0, -1, 0
OFFSET
0,1
COMMENTS
Rows sum of triangle are A105568. Diagonal sums are A105569.
FORMULA
As a table read by antidiagonals, T(n, k) = -mu(k*n);
As a number triangle read by rows, T(n, k) = if(k<=n, -mu(k(n-k)), 0).
EXAMPLE
Triangle begins
1;
1, 1;
1, -1, 1;
1, 1, 1, 1;
1, 1, 0, 1, 1;
1, 0, -1, -1, 0, 1;
CROSSREFS
Cf. A003991.
Sequence in context: A196368 A178788 A131217 * A114213 A108358 A267959
KEYWORD
easy,sign,tabl
AUTHOR
Paul Barry, Apr 14 2005
STATUS
approved