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 | 1 |
| 2 | 8 |
| 3 | 22 |
| 4 | 45 |
| 5 | 138 |
| 6 | 415 |
| 7 | 916 |
| 8 | 3998 |
| 9 | 13142 |
| 10 | 38763 |
| 11 | 60718 |
| 12 | 44686 |
| 13 | 121298 |
| 14 | 2068731 |
| 15 | 11214378 |
| 16 | 25158877 |
| 17 | 3909879 |
| 18 | 299954193 |
| 19 | 977046702 |
| 20 | 3028468981 |
| 21 | 1107563239 |
| 22 | 2983913960 |
| 23 | 91973871622 |