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 | 17 |
| 2 | 137 |
| 3 | 707 |
| 4 | 2709 |
| 5 | 8417 |
| 6 | 22408 |
| 7 | 53008 |
| 8 | 114251 |
| 9 | 228431 |
| 10 | 429325 |
| 11 | 766167 |
| 12 | 1308451 |
| 13 | 2151643 |
| 14 | 3423880 |
| 15 | 5293736 |
| 16 | 7979133 |
| 17 | 11757477 |
| 18 | 16977097 |
| 19 | 24070067 |
| 20 | 33566489 |
| 21 | 46110317 |
| 22 | 62476800 |
| 23 | 83591624 |
| 24 | 110551831 |
| 25 | 144648595 |
| 26 | 187391933 |
| 27 | 240537431 |
| 28 | 306115063 |
| 29 | 386460183 |
| 30 | 484246768 |