cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A364725 Starting with a plane on which two parallel lines and two additional lines have been drawn such that the four lines form two non-congruent triangles, a(n) is the total number of lines on the plane after the n-th step, where each step consists of drawing lines that connect every intersection of two lines.

Table of values

n a(n)
1 4
2 6
3 7
4 11
5 69
6 176404

List of values

[4, 6, 7, 11, 69, 176404]