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.

A345650 Number of polygon edges formed when connecting all 4n points on the perimeter of an n X n square by infinite lines.

Table of values

n a(n)
0 0
1 8
2 140
3 1032
4 3608
5 11308
6 21892
7 51000
8 83404
9 143900
10 217728
11 367132
12 456008
13 749328
14 952236
15 1251056
16 1649708
17 2327232
18 2653900
19 3717444
20 4158448
21 5243680
22 6488208
23 8241988
24 8780976
25 11235028
26 13116156

List of values

[0, 8, 140, 1032, 3608, 11308, 21892, 51000, 83404, 143900, 217728, 367132, 456008, 749328, 952236, 1251056, 1649708, 2327232, 2653900, 3717444, 4158448, 5243680, 6488208, 8241988, 8780976, 11235028, 13116156]