OFFSET
1,5
COMMENTS
A013929 gives the indices of rows that are all zeros. - Michel Marcus, Feb 15 2022
FORMULA
EXAMPLE
First few rows of the triangle:
1;
-1, -1;
-1, -2, -1;
0, 0, 0, 0;
-1, -4, -6, -4, -1;
1, 5, 10, 10, 5, 1;
...
MAPLE
A127512 := proc(n, k)
numtheory[mobius](n)*binomial(n-1, k-1) ;
end proc:
seq(seq( A127512(n, k), k=1..n), n=1..10) ; # R. J. Mathar, Aug 15 2022
PROG
(PARI) row(n) = my(M = matrix(n, n, i, j, if (i==j, moebius(i))), P = matrix(n, n, i, j, binomial(i-1, j-1))); vector(n, k, (M*P)[n, k]); \\ Michel Marcus, Feb 15 2022
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, Jan 17 2007
EXTENSIONS
Edited by N. J. A. Sloane, Sep 25 2008
NAME simplified by R. J. Mathar, Aug 15 2022
STATUS
approved