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 | 7 |
| 3 | 32 |
| 4 | 149 |
| 5 | 630 |
| 6 | 2600 |
| 7 | 10426 |
| 8 | 41079 |
| 9 | 159330 |
| 10 | 611698 |
| 11 | 2329458 |
| 12 | 8818874 |
| 13 | 33234990 |
| 14 | 124835120 |
| 15 | 467743203 |
| 16 | 1749482957 |
| 17 | 6535398559 |
| 18 | 24393753898 |
| 19 | 91006458115 |
| 20 | 339442473410 |
| 21 | 1266045976128 |
| 22 | 4722720042212 |
| 23 | 17621749081077 |
| 24 | 65775214030886 |