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 | 1212 |
| 2 | 2936 |
| 3 | 7834 |
| 4 | 21860 |
| 5 | 59188 |
| 6 | 149960 |
| 7 | 370510 |
| 8 | 941024 |
| 9 | 2487276 |
| 10 | 6650600 |
| 11 | 17371025 |
| 12 | 44270908 |
| 13 | 112541478 |
| 14 | 290771496 |
| 15 | 762899717 |
| 16 | 1998910152 |
| 17 | 5175319416 |
| 18 | 13289503784 |
| 19 | 34202437664 |
| 20 | 88756842476 |
| 21 | 231356200114 |
| 22 | 601422231744 |