Simple programs for working with normal distributions, for calculating the lower-tail normal CDF, the normal PDF Z(x), normally distributed random numbers, and an array of normally distributed complex numbers.

Given an integer n on the stack, these two programs return a list of the partition numbers (A000041) from 0 through n. The first program is small, and the second one is fast.

Set of three User RPL programs to compute the Ramanujan tau function (A000594) for positive integers. Requires Sum of Divisors to an Integer Power and ListExt. Also includes a standalone program written in System RPL.

A program that uses the shoelace method for calculating the area of a polygon and another version that also calculates the area and centroid (barycenter) of a polygon.

Set of two programs for zigzag numbers. One returns a list of the zigzag numbers (A000111) from 0 though n. The even-indexed terms (starting with 0) of the list are the unsigned Euler numbers, also known as secant numbers (AA000364). The odd-indexed terms (starting with 1) are the tangent numbers, AA000182. The other returns rows 0 through n of AA008281, the triangle from which the zigzag numbers are derived. Requires GoferLists.