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.

A111080 Sum of numbers under a triangle on a spiral staircase of width 10.

Table of values

n a(n)
0 11
1 44
2 110
3 220
4 385
5 616
6 924
7 1320
8 1815
9 2420
10 3146
11 4004
12 5005
13 6160
14 7480
15 8976
16 10659
17 12540
18 14630
19 16940
20 19481
21 22264
22 25300
23 28600
24 32175
25 36036
26 40194
27 44660
28 49445
29 54560
30 60016
31 65824
32 71995
33 78540
34 85470
35 92796
36 100529
37 108680
38 117260

List of values

[11, 44, 110, 220, 385, 616, 924, 1320, 1815, 2420, 3146, 4004, 5005, 6160, 7480, 8976, 10659, 12540, 14630, 16940, 19481, 22264, 25300, 28600, 32175, 36036, 40194, 44660, 49445, 54560, 60016, 65824, 71995, 78540, 85470, 92796, 100529, 108680, 117260]