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.

A355839 Number of vertices formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square.

Table of values

n a(n)
1 5
2 25
3 133
4 357
5 1013
6 1637
7 3761
8 5561
9 9313
10 13065
11 21689
12 25357
13 41553
14 50157
15 66005
16 84897
17 117793
18 129841
19 181717
20 198857
21 251189
22 302293
23 383161
24 401073
25 517193
26 587041
27 687765
28 763425
29 949869
30 966249
31 1234425
32 1320913
33 1512233
34 1703657
35 1912765
36 2023569
37 2475361
38 2649813
39 2934997

List of values

[5, 25, 133, 357, 1013, 1637, 3761, 5561, 9313, 13065, 21689, 25357, 41553, 50157, 66005, 84897, 117793, 129841, 181717, 198857, 251189, 302293, 383161, 401073, 517193, 587041, 687765, 763425, 949869, 966249, 1234425, 1320913, 1512233, 1703657, 1912765, 2023569, 2475361, 2649813, 2934997]