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We generalize Wallis's 1655 infinite product for $\pi/2$ to one for$(\pi/K)\csc(\pi/K)$, as well as give new Wallis-type products for $\pi/4, 2,\sqrt{2+\sqrt2}, 2\pi/3\sqrt3,$ and other constants. The proofs use a classicalinfinite product formula involving the gamma function. We also extend Catalan's1873 infinite product of radicals for $e$ to Catalan-type products for$e/4,\sqrt{e}$, and $e^{3/2}/2$. Here the proofs use Stirling's formula.Finally, we find an analog for $e^{2/3}/\sqrt3$ of Pippenger's 1980 infiniteproduct for $e/2$, and we conjecture that they can be generalized to a productfor a power of $e^{1/K}$.

New Wallis- and Catalan-Type Infinite Products for $\pi, e$, and $\sqrt{2+\sqrt2}$