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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.

A131874 a(n) = (7*n^2 + 15*n + 2) / 2.

Table of values

n a(n)
0 1
1 12
2 30
3 55
4 87
5 126
6 172
7 225
8 285
9 352
10 426
11 507
12 595
13 690
14 792
15 901
16 1017
17 1140
18 1270
19 1407
20 1551
21 1702
22 1860
23 2025
24 2197
25 2376
26 2562
27 2755
28 2955
29 3162
30 3376
31 3597
32 3825
33 4060
34 4302
35 4551
36 4807
37 5070
38 5340
39 5617
40 5901
41 6192
42 6490
43 6795
44 7107
45 7426

List of values

[1, 12, 30, 55, 87, 126, 172, 225, 285, 352, 426, 507, 595, 690, 792, 901, 1017, 1140, 1270, 1407, 1551, 1702, 1860, 2025, 2197, 2376, 2562, 2755, 2955, 3162, 3376, 3597, 3825, 4060, 4302, 4551, 4807, 5070, 5340, 5617, 5901, 6192, 6490, 6795, 7107, 7426]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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