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 | 7 |
| 2 | 38 |
| 3 | 219 |
| 4 | 1300 |
| 5 | 7781 |
| 6 | 46662 |
| 7 | 279943 |
| 8 | 1679624 |
| 9 | 10077705 |
| 10 | 60466186 |
| 11 | 362797067 |
| 12 | 2176782348 |
| 13 | 13060694029 |
| 14 | 78364164110 |
| 15 | 470184984591 |
| 16 | 2821109907472 |
| 17 | 16926659444753 |
| 18 | 101559956668434 |
| 19 | 609359740010515 |
| 20 | 3656158440062996 |
| 21 | 21936950640377877 |
| 22 | 131621703842267158 |
| 23 | 789730223053602839 |