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) |
|---|---|
| 0 | 6 |
| 1 | 13 |
| 2 | 32 |
| 3 | 397 |
| 4 | 826 |
| 5 | 2049 |
| 6 | 25414 |
| 7 | 52877 |
| 8 | 131168 |
| 9 | 1626893 |
| 10 | 3384954 |
| 11 | 8396801 |
| 12 | 104146566 |
| 13 | 216689933 |
| 14 | 537526432 |
| 15 | 6667007117 |
| 16 | 13871540666 |
| 17 | 34410088449 |
| 18 | 426792602054 |
| 19 | 887995292557 |
| 20 | 2202783187168 |
| 21 | 27321393538573 |