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 | 18 |
| 3 | 109 |
| 4 | 407 |
| 5 | 1152 |
| 6 | 2723 |
| 7 | 5670 |
| 8 | 10746 |
| 9 | 18939 |
| 10 | 31504 |
| 11 | 49995 |
| 12 | 76297 |
| 13 | 112658 |
| 14 | 161721 |
| 15 | 226556 |
| 16 | 310692 |
| 17 | 418149 |
| 18 | 553470 |
| 19 | 721753 |
| 20 | 928683 |
| 21 | 1180564 |
| 22 | 1484351 |
| 23 | 1847682 |
| 24 | 2278910 |
| 25 | 2787135 |
| 26 | 3382236 |
| 27 | 4074903 |
| 28 | 4876669 |
| 29 | 5799942 |
| 30 | 6858037 |