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) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 55 |
| 3 | 220 |
| 4 | 715 |
| 5 | 2001 |
| 6 | 4995 |
| 7 | 11385 |
| 8 | 24090 |
| 9 | 47905 |
| 10 | 90376 |
| 11 | 162955 |
| 12 | 282490 |
| 13 | 473110 |
| 14 | 768570 |
| 15 | 1215126 |
| 16 | 1875015 |
| 17 | 2830620 |
| 18 | 4189405 |
| 19 | 6089710 |
| 20 | 8707501 |
| 21 | 12264175 |
| 22 | 17035525 |
| 23 | 23361975 |
| 24 | 31660200 |
| 25 | 42436251 |
| 26 | 56300310 |
| 27 | 73983205 |
| 28 | 96354820 |
| 29 | 124444540 |
| 30 | 159463876 |
| 31 | 202831420 |
| 32 | 256200285 |
| 33 | 321488190 |