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.

A358409 Number of edges formed in a square by straight line segments when connecting the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on each of the two adjacent edges of the square.

Table of values

n a(n)
1 4
2 12
3 68
4 316
5 1020
6 2524
7 5420
8 10348
9 18044
10 29244
11 45940
12 66188
13 97796
14 135772
15 182532
16 240932
17 321612
18 405852
19 525184
20 646088
21 796388
22 974740
23 1199244
24 1407140
25 1700944
26 2004576
27 2356296
28 2729256
29 3221296
30 3630296
31 4272656
32 4835984
33 5522768
34 6269016
35 7084056
36 7835068
37 8987192
38 10005400

List of values

[4, 12, 68, 316, 1020, 2524, 5420, 10348, 18044, 29244, 45940, 66188, 97796, 135772, 182532, 240932, 321612, 405852, 525184, 646088, 796388, 974740, 1199244, 1407140, 1700944, 2004576, 2356296, 2729256, 3221296, 3630296, 4272656, 4835984, 5522768, 6269016, 7084056, 7835068, 8987192, 10005400]