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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.

A258582 a(n) = n*(2*n + 1)*(4*n + 1)/3.

Table of values

n a(n)
0 0
1 5
2 30
3 91
4 204
5 385
6 650
7 1015
8 1496
9 2109
10 2870
11 3795
12 4900
13 6201
14 7714
15 9455
16 11440
17 13685
18 16206
19 19019
20 22140
21 25585
22 29370
23 33511
24 38024
25 42925
26 48230
27 53955
28 60116
29 66729
30 73810
31 81375
32 89440
33 98021
34 107134
35 116795
36 127020
37 137825
38 149226
39 161239
40 173880

List of values

[0, 5, 30, 91, 204, 385, 650, 1015, 1496, 2109, 2870, 3795, 4900, 6201, 7714, 9455, 11440, 13685, 16206, 19019, 22140, 25585, 29370, 33511, 38024, 42925, 48230, 53955, 60116, 66729, 73810, 81375, 89440, 98021, 107134, 116795, 127020, 137825, 149226, 161239, 173880]

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

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