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.

A271913 Number of ways to choose three distinct points from a 4 X n grid so that they form an isosceles triangle.

Table of values

n a(n)
1 0
2 16
3 68
4 148
5 248
6 360
7 488
8 620
9 768
10 924
11 1096
12 1272
13 1464
14 1660
15 1872
16 2088
17 2320
18 2556
19 2808
20 3064
21 3336
22 3612
23 3904
24 4200
25 4512
26 4828
27 5160
28 5496
29 5848
30 6204
31 6576
32 6952
33 7344
34 7740
35 8152
36 8568
37 9000
38 9436
39 9888
40 10344
41 10816
42 11292
43 11784
44 12280
45 12792
46 13308
47 13840
48 14376
49 14928
50 15484

List of values

[0, 16, 68, 148, 248, 360, 488, 620, 768, 924, 1096, 1272, 1464, 1660, 1872, 2088, 2320, 2556, 2808, 3064, 3336, 3612, 3904, 4200, 4512, 4828, 5160, 5496, 5848, 6204, 6576, 6952, 7344, 7740, 8152, 8568, 9000, 9436, 9888, 10344, 10816, 11292, 11784, 12280, 12792, 13308, 13840, 14376, 14928, 15484]