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.

A171662 a(n) = floor((2*n^2 + n)/6).

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 6
5 9
6 13
7 17
8 22
9 28
10 35
11 42
12 50
13 58
14 67
15 77
16 88
17 99
18 111
19 123
20 136
21 150
22 165
23 180
24 196
25 212
26 229
27 247
28 266
29 285
30 305
31 325
32 346
33 368
34 391
35 414
36 438
37 462
38 487
39 513
40 540
41 567
42 595
43 623
44 652
45 682
46 713
47 744
48 776
49 808
50 841
51 875
52 910
53 945

List of values

[0, 0, 1, 3, 6, 9, 13, 17, 22, 28, 35, 42, 50, 58, 67, 77, 88, 99, 111, 123, 136, 150, 165, 180, 196, 212, 229, 247, 266, 285, 305, 325, 346, 368, 391, 414, 438, 462, 487, 513, 540, 567, 595, 623, 652, 682, 713, 744, 776, 808, 841, 875, 910, 945]