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.

A357196 Number of regions in a hexagon when n internal hexagons are drawn between the 6n points that divide each side into n+1 equal parts.

Table of values

n a(n)
0 1
1 7
2 25
3 55
4 97
5 151
6 217
7 295
8 385
9 475
10 601
11 715
12 865
13 1015
14 1159
15 1351
16 1537
17 1735
18 1945
19 2131
20 2401
21 2647
22 2905
23 3115
24 3457
25 3751
26 4057
27 4357
28 4705
29 5005
30 5401
31 5767
32 6133
33 6535
34 6925
35 7303
36 7777
37 8215
38 8653
39 9025
40 9601
41 10051
42 10585
43 11071
44 11587
45 12151
46 12697
47 13171
48 13825
49 14395
50 14989

List of values

[1, 7, 25, 55, 97, 151, 217, 295, 385, 475, 601, 715, 865, 1015, 1159, 1351, 1537, 1735, 1945, 2131, 2401, 2647, 2905, 3115, 3457, 3751, 4057, 4357, 4705, 5005, 5401, 5767, 6133, 6535, 6925, 7303, 7777, 8215, 8653, 9025, 9601, 10051, 10585, 11071, 11587, 12151, 12697, 13171, 13825, 14395, 14989]