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.

A190318 Number of obtuse isosceles triangles on an n X n grid.

Table of values

n a(n)
1 0
2 0
3 0
4 4
5 36
6 100
7 256
8 496
9 968
10 1672
11 2736
12 4092
13 6188
14 8764
15 12144
16 16464
17 22224
18 28928
19 37400
20 47076
21 59244
22 73580
23 90344
24 109000
25 132048
26 158000
27 187528
28 220716
29 259348
30 301388
31 350088
32 402792
33 463176
34 529720
35 602888
36 683092
37 774476
38 872100
39 978232

List of values

[0, 0, 0, 4, 36, 100, 256, 496, 968, 1672, 2736, 4092, 6188, 8764, 12144, 16464, 22224, 28928, 37400, 47076, 59244, 73580, 90344, 109000, 132048, 158000, 187528, 220716, 259348, 301388, 350088, 402792, 463176, 529720, 602888, 683092, 774476, 872100, 978232]