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 | 1024 |
| 2 | 9537 |
| 3 | 169351 |
| 4 | 1922602 |
| 5 | 14455511 |
| 6 | 79525194 |
| 7 | 345716131 |
| 8 | 1253815680 |
| 9 | 3941971041 |
| 10 | 11046221255 |
| 11 | 28162516240 |
| 12 | 66354069278 |
| 13 | 146236468528 |
| 14 | 304356025990 |
| 15 | 602797997503 |
| 16 | 1143224193789 |
| 17 | 2086847748927 |
| 18 | 3682210047877 |
| 19 | 6303034667439 |
| 20 | 10498899284253 |
| 21 | 17061992477839 |