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.
| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 121 |
| 3 | 1055 |
| 4 | 3506 |
| 5 | 10410 |
| 6 | 21111 |
| 7 | 43740 |
| 8 | 74526 |
| 9 | 124490 |
| 10 | 190291 |
| 11 | 288190 |
| 12 | 403321 |
| 13 | 573805 |
| 14 | 771191 |
| 15 | 1027550 |
| 16 | 1331896 |
| 17 | 1721765 |
| 18 | 2157301 |
| 19 | 2712175 |
| 20 | 3322441 |
| 21 | 4067325 |
| 22 | 4904491 |
| 23 | 5900185 |
| 24 | 6975151 |
| 25 | 8268755 |
| 26 | 9678566 |
| 27 | 11297345 |
| 28 | 13060231 |
| 29 | 15102955 |
| 30 | 17263311 |
| 31 | 19784995 |