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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 20 |
| 7 | 7 |
| 8 | 38 |
| 9 | 135 |
| 10 | 4102 |
| 11 | 11 |
| 12 | 1670 |
| 13 | 13 |
| 14 | 1679624 |
| 15 | 4202505 |
| 16 | 270346 |
| 17 | 17 |
| 18 | 60539912 |
| 19 | 19 |
| 20 | 4299292682 |
| 21 | 470185508877 |
| 22 | 1000000000012 |
| 23 | 23 |
| 24 | 17253793802 |
| 25 | 4398046511125 |
| 26 | 1283918464548878 |
| 27 | 609359773564947 |
| 28 | 131622174060806158 |
| 29 | 29 |
| 30 | 4789472952582154 |
| 31 | 31 |