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.

A213396 Number of (w,x,y) with all terms in {0,...,n} and 2*w < |x+y-w|.

Table of values

n a(n)
0 0
1 3
2 9
3 21
4 42
5 72
6 114
7 171
8 243
9 333
10 444
11 576
12 732
13 915
14 1125
15 1365
16 1638
17 1944
18 2286
19 2667
20 3087
21 3549
22 4056
23 4608
24 5208
25 5859
26 6561
27 7317
28 8130
29 9000
30 9930
31 10923
32 11979
33 13101
34 14292
35 15552
36 16884
37 18291
38 19773
39 21333
40 22974
41 24696

List of values

[0, 3, 9, 21, 42, 72, 114, 171, 243, 333, 444, 576, 732, 915, 1125, 1365, 1638, 1944, 2286, 2667, 3087, 3549, 4056, 4608, 5208, 5859, 6561, 7317, 8130, 9000, 9930, 10923, 11979, 13101, 14292, 15552, 16884, 18291, 19773, 21333, 22974, 24696]