At this demos link, you can experiment with how the formula for the sequence determines the terms, as well as tell whether the function is bounded, increasing, eventually increasing, etc.
Category: Desmos Links – Calc 2
Desmos – Riemann Sums and Definite Integrals (4.2, 4.3)
At this link, you will learn how to use desmos to calculate Riemann Sums and definite integrals very quickly, check your work, and also see what is going on with the graph.