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 | 28 |
| 3 | 138 |
| 4 | 587 |
| 5 | 612 |
| 6 | 2824 |
| 7 | 27654 |
| 8 | 29603 |
| 9 | 131468 |
| 10 | 1312748 |
| 11 | 1616488 |
| 12 | 2811574 |
| 13 | 49629974 |
| 14 | 139796852 |
| 15 | 281986403 |
| 16 | 1264554822 |
| 17 | 6146857824 |
| 18 | 16162692208 |
| 19 | 60598584603 |
| 20 | 229717543765 |
| 21 | 606069984352 |
| 22 | 2811738231378 |
| 23 | 5869673191741 |