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 | 3492 |
| 2 | 12156 |
| 3 | 42400 |
| 4 | 147984 |
| 5 | 516652 |
| 6 | 1804128 |
| 7 | 6301554 |
| 8 | 22009836 |
| 9 | 76884550 |
| 10 | 268579888 |
| 11 | 938237580 |
| 12 | 3277608092 |
| 13 | 11449981646 |
| 14 | 39999390704 |
| 15 | 139734492670 |
| 16 | 488151637034 |
| 17 | 1705321234646 |
| 18 | 5957415743556 |
| 19 | 20811807878768 |
| 20 | 72704583358670 |