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 | 10 |
| 3 | 55 |
| 4 | 200 |
| 5 | 560 |
| 6 | 1316 |
| 7 | 2730 |
| 8 | 5160 |
| 9 | 9075 |
| 10 | 15070 |
| 11 | 23881 |
| 12 | 36400 |
| 13 | 53690 |
| 14 | 77000 |
| 15 | 107780 |
| 16 | 147696 |
| 17 | 198645 |
| 18 | 262770 |
| 19 | 342475 |
| 20 | 440440 |
| 21 | 559636 |
| 22 | 703340 |
| 23 | 875150 |
| 24 | 1079000 |
| 25 | 1319175 |
| 26 | 1600326 |
| 27 | 1927485 |
| 28 | 2306080 |
| 29 | 2741950 |
| 30 | 3241360 |