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.

A369177 Number of edges in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row.

Table of values

n a(n)
1 6
2 24
3 66
4 152
5 318
6 576
7 998
8 1608
9 2474
10 3600
11 5162
12 7100
13 9670
14 12772
15 16546
16 21036
17 26622
18 33024
19 40814
20 49716
21 60006
22 71560
23 85158
24 100264
25 117626
26 136780
27 158358
28 182080
29 209106
30 238312
31 271314
32 307304
33 346866
34 389488
35 436286
36 486444
37 542026
38 601436
39 665814
40 734504
41 809882
42 889544

List of values

[6, 24, 66, 152, 318, 576, 998, 1608, 2474, 3600, 5162, 7100, 9670, 12772, 16546, 21036, 26622, 33024, 40814, 49716, 60006, 71560, 85158, 100264, 117626, 136780, 158358, 182080, 209106, 238312, 271314, 307304, 346866, 389488, 436286, 486444, 542026, 601436, 665814, 734504, 809882, 889544]