OFFSET
1,4
COMMENTS
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1275
FORMULA
A054523^(-1), as an infinite lower triangular matrix.
T(n,k) = A023900(n/k) for k | n, T(n,k) = 0 otherwise. - Andrew Howroyd, Aug 03 2018
EXAMPLE
First few rows of the triangle:
1;
-1, 1;
-2, 0, 1;
-1, -1, 0, 1;
-4, 0, 0, 0, 1;
2, -2, -1, 0, 0, 1;
...
PROG
(PARI) T(n, k)={if(n%k, 0, sumdivmult(n/k, d, d*moebius(d)))} \\ Andrew Howroyd, Aug 03 2018
CROSSREFS
KEYWORD
tabl,sign
AUTHOR
Gary W. Adamson, May 04 2007
EXTENSIONS
Terms a(56) and beyond from Andrew Howroyd, Aug 03 2018
STATUS
approved