Query polygonal numbers and do calculations with them or check whether values are members of a figurate number class.
Compute a polygonal number:
Determine whether a number belongs to a given class:
Analyze numbers in terms of their relationship with the sum of their divisors.
Determine whether a number belongs to a given class:
Find a number or a set of numbers meeting certain criteria or check whether an individual value meets specified criteria.
Find a number matching specified criteria:
Find numbers matching specified criteria:
Perform operations on defined sets of numbers.
Take the sum or product of a sequence of numbers of a given type:
Query elements and rows of this famous triangle or analyze the values of its elements subject to a modulus or other condition.
Generate Pascal's triangle:
Compute Pascal's triangle modulo an integer: