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 | 3 |
| 2 | 10 |
| 3 | 21 |
| 4 | 63 |
| 5 | 104 |
| 6 | 152 |
| 7 | 170 |
| 8 | 358 |
| 9 | 567 |
| 10 | 651 |
| 11 | 3826 |
| 12 | 4664 |
| 13 | 5583 |
| 14 | 5943 |
| 15 | 39248 |
| 16 | 943228 |
| 17 | 1906503 |
| 18 | 9166540 |
| 19 | 35702868 |
| 20 | 701792828 |
| 21 | 825415941 |
| 22 | 2275142000 |
| 23 | 5805372939 |