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.

A341441 Total number of triangles visible in a regular (2n+1)-gon with all diagonals drawn.

Table of values

n a(n)
1 1
2 35
3 287
4 1302
5 4257
6 11297
7 25935
8 53516
9 101745
10 181279
11 306383
12 495650
13 772785
14 1167453
15 1716191
16 2463384
17 3462305
18 4776219
19 6479551
20 8659118
21 11415425
22 14864025
23 19136943
24 24384164
25 30775185
26 38500631
27 47773935
28 58833082
29 71942417
30 87394517
31 105512127

List of values

[1, 35, 287, 1302, 4257, 11297, 25935, 53516, 101745, 181279, 306383, 495650, 772785, 1167453, 1716191, 2463384, 3462305, 4776219, 6479551, 8659118, 11415425, 14864025, 19136943, 24384164, 30775185, 38500631, 47773935, 58833082, 71942417, 87394517, 105512127]