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 | 11 |
| 3 | 60 |
| 4 | 406 |
| 5 | 3171 |
| 6 | 27411 |
| 7 | 255617 |
| 8 | 2528613 |
| 9 | 26224097 |
| 10 | 282706396 |
| 11 | 3147801820 |
| 12 | 36022733951 |
| 13 | 422047425238 |
| 14 | 5046771514478 |
| 15 | 61438059222438 |
| 16 | 759851375725606 |
| 17 | 9530872096367508 |
| 18 | 121063493728881999 |
| 19 | 1555352365759798758 |