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 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 30 |
| 5 | 85 |
| 6 | 257 |
| 7 | 1031 |
| 8 | 2493 |
| 9 | 3288 |
| 10 | 7604 |
| 11 | 13392 |
| 12 | 22663 |
| 13 | 26818 |
| 14 | 31377 |
| 15 | 110175 |
| 16 | 186971 |
| 17 | 400432 |
| 18 | 890621 |
| 19 | 1536566 |
| 20 | 17176199 |
| 21 | 27501485 |
| 22 | 102834105 |
| 23 | 173246634 |
| 24 | 182261294 |
| 25 | 214104745 |
| 26 | 268935021 |
| 27 | 1781734397 |
| 28 | 4010389565 |
| 29 | 6213586719 |