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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.

A220083 a(n) = (15*n^2 + 9*n + 2)/2.

Table of values

n a(n)
0 1
1 13
2 40
3 82
4 139
5 211
6 298
7 400
8 517
9 649
10 796
11 958
12 1135
13 1327
14 1534
15 1756
16 1993
17 2245
18 2512
19 2794
20 3091
21 3403
22 3730
23 4072
24 4429
25 4801
26 5188
27 5590
28 6007
29 6439
30 6886
31 7348
32 7825
33 8317
34 8824
35 9346
36 9883
37 10435
38 11002
39 11584
40 12181
41 12793
42 13420
43 14062

List of values

[1, 13, 40, 82, 139, 211, 298, 400, 517, 649, 796, 958, 1135, 1327, 1534, 1756, 1993, 2245, 2512, 2794, 3091, 3403, 3730, 4072, 4429, 4801, 5188, 5590, 6007, 6439, 6886, 7348, 7825, 8317, 8824, 9346, 9883, 10435, 11002, 11584, 12181, 12793, 13420, 14062]

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

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