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 | 10 |
| 2 | 65 |
| 3 | 442 |
| 4 | 3026 |
| 5 | 20737 |
| 6 | 142130 |
| 7 | 974170 |
| 8 | 6677057 |
| 9 | 45765226 |
| 10 | 313679522 |
| 11 | 2149991425 |
| 12 | 14736260450 |
| 13 | 101003831722 |
| 14 | 692290561601 |
| 15 | 4745030099482 |
| 16 | 32522920134770 |
| 17 | 222915410843905 |
| 18 | 1527884955772562 |
| 19 | 10472279279564026 |
| 20 | 71778070001175617 |
| 21 | 491974210728665290 |
| 22 | 3372041405099481410 |