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 | 210 |
| 2 | 7314 |
| 3 | 37960 |
| 4 | 134043 |
| 5 | 357642 |
| 6 | 2713332 |
| 7 | 1217250 |
| 8 | 14273478 |
| 9 | 44939642 |
| 10 | 76067298 |
| 11 | 163459742 |
| 12 | 547163235 |
| 13 | 2081479430 |
| 14 | 2771263512 |
| 15 | 11715712410 |
| 16 | 17911205580 |
| 17 | 56608713884 |
| 18 | 203594236366 |
| 19 | 118968284928 |
| 20 | 2500769994070 |
| 21 | 3157129230489 |
| 22 | 22498525938216 |
| 23 | 585927201062 |