Problem 56020. Easy Sequences 72: Complete Graph

In Graph Theory, we say a graph is a Complete Graph, if all of its nodes are connected to evey other nodes in the graph. Examples of complete graphs are shown below.
In this problem we are asked to calculate , which is the number of connections of a complete graph with n nodes.

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27.27% Correct | 72.73% Incorrect
Last Solution submitted on May 24, 2024

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