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.

A164013 3 times centered triangular numbers: 9*n*(n+1)/2 + 3.

Table of values

n a(n)
0 3
1 12
2 30
3 57
4 93
5 138
6 192
7 255
8 327
9 408
10 498
11 597
12 705
13 822
14 948
15 1083
16 1227
17 1380
18 1542
19 1713
20 1893
21 2082
22 2280
23 2487
24 2703
25 2928
26 3162
27 3405
28 3657
29 3918
30 4188
31 4467
32 4755
33 5052
34 5358
35 5673
36 5997
37 6330
38 6672
39 7023
40 7383
41 7752

List of values

[3, 12, 30, 57, 93, 138, 192, 255, 327, 408, 498, 597, 705, 822, 948, 1083, 1227, 1380, 1542, 1713, 1893, 2082, 2280, 2487, 2703, 2928, 3162, 3405, 3657, 3918, 4188, 4467, 4755, 5052, 5358, 5673, 5997, 6330, 6672, 7023, 7383, 7752]