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.

A211612 Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+x+y>=0.

Table of values

n a(n)
0 0
1 4
2 35
3 117
4 274
5 530
6 909
7 1435
8 2132
9 3024
10 4135
11 5489
12 7110
13 9022
14 11249
15 13815
16 16744
17 20060
18 23787
19 27949
20 32570
21 37674
22 43285
23 49427
24 56124
25 63400
26 71279
27 79785
28 88942
29 98774
30 109305
31 120559
32 132560
33 145332
34 158899
35 173285
36 188514
37 204610
38 221597

List of values

[0, 4, 35, 117, 274, 530, 909, 1435, 2132, 3024, 4135, 5489, 7110, 9022, 11249, 13815, 16744, 20060, 23787, 27949, 32570, 37674, 43285, 49427, 56124, 63400, 71279, 79785, 88942, 98774, 109305, 120559, 132560, 145332, 158899, 173285, 188514, 204610, 221597]

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

Content is available under The OEIS End-User License Agreement.