"Counting in their heads" - 1895 oil painting

[Gerson W. Barbosa]

(08-15-2020 05:04 AM)Joe Horn Wrote:  Anybody know which zeta function Prime's CAS uses when Zeta() is given two arguments?

That’s the derivative of Zeta function. The second argument is the derivative order. In W|A:

(d^2 ζ(x))/(dx^2), x = 2