OFFSET
1,10
COMMENTS
(a,b)*(x,y) = (a*x,b*y); unit is (1,1).
FORMULA
Dirichlet g.f.: A(s, t) = exp(B(s, t)/1 + B(2*s, 2*t)/2 + B(3*s, 3*t)/3 + ...) where B(s, t) = zeta(s)*(zeta(t)-1).
EXAMPLE
Table begins
1 0 0 0 0 ...
1 1 1 1 1 ...
1 1 1 1 1 ...
2 2 2 3 2 ...
1 1 1 1 1 ...
...
(6,4) = (3,4)*(2,1) = (3,1)*(2,4) = (3,2)*(2,2), so a(6,4)=4.
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Christian G. Bower, Jun 03 2005
EXTENSIONS
Definition clarified and original interpretation restored by Sean A. Irvine, Oct 03 2021
STATUS
approved