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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.

A081441 a(n) = (2*n^3 - n^2 - n + 2)/2.

Table of values

n a(n)
0 1
1 1
2 6
3 22
4 55
5 111
6 196
7 316
8 477
9 685
10 946
11 1266
12 1651
13 2107
14 2640
15 3256
16 3961
17 4761
18 5662
19 6670
20 7791
21 9031
22 10396
23 11892
24 13525
25 15301
26 17226
27 19306
28 21547
29 23955
30 26536
31 29296
32 32241
33 35377
34 38710
35 42246
36 45991
37 49951
38 54132
39 58540
40 63181

List of values

[1, 1, 6, 22, 55, 111, 196, 316, 477, 685, 946, 1266, 1651, 2107, 2640, 3256, 3961, 4761, 5662, 6670, 7791, 9031, 10396, 11892, 13525, 15301, 17226, 19306, 21547, 23955, 26536, 29296, 32241, 35377, 38710, 42246, 45991, 49951, 54132, 58540, 63181]

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

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