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 | 3 |
| 1 | 60 |
| 2 | 2093 |
| 3 | 13398 |
| 4 | 47415 |
| 5 | 123728 |
| 6 | 268065 |
| 7 | 512298 |
| 8 | 894443 |
| 9 | 1458660 |
| 10 | 2255253 |
| 11 | 3340670 |
| 12 | 4777503 |
| 13 | 6634488 |
| 14 | 8986505 |
| 15 | 11914578 |
| 16 | 15505875 |
| 17 | 19853708 |
| 18 | 25057533 |
| 19 | 31222950 |
| 20 | 38461703 |
| 21 | 46891680 |
| 22 | 56636913 |
| 23 | 67827578 |
| 24 | 80599995 |
| 25 | 95096628 |
| 26 | 111466085 |
| 27 | 129863118 |
| 28 | 150448623 |