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 | 6 |
| 3 | 23 |
| 4 | 70 |
| 5 | 184 |
| 6 | 438 |
| 7 | 971 |
| 8 | 2042 |
| 9 | 4125 |
| 10 | 8076 |
| 11 | 15424 |
| 12 | 28876 |
| 13 | 53189 |
| 14 | 96670 |
| 15 | 173747 |
| 16 | 309362 |
| 17 | 546456 |
| 18 | 958690 |
| 19 | 1672015 |
| 20 | 2901170 |
| 21 | 5011321 |
| 22 | 8621976 |
| 23 | 14781888 |
| 24 | 25263000 |
| 25 | 43053769 |
| 26 | 73186038 |
| 27 | 124119311 |
| 28 | 210055582 |
| 29 | 354806200 |
| 30 | 598245006 |