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 | 2 |
| 2 | 36 |
| 3 | 362 |
| 4 | 2570 |
| 5 | 14240 |
| 6 | 65226 |
| 7 | 256508 |
| 8 | 889716 |
| 9 | 2777370 |
| 10 | 7925720 |
| 11 | 20934474 |
| 12 | 51697802 |
| 13 | 120353324 |
| 14 | 265953170 |
| 15 | 561075720 |
| 16 | 1135620536 |
| 17 | 2214405618 |
| 18 | 4175000796 |
| 19 | 7634582090 |
| 20 | 13577591370 |
| 21 | 23539760552 |
| 22 | 39868752506 |
| 23 | 66087441092 |
| 24 | 107392877100 |
| 25 | 171332460650 |
| 26 | 268708978512 |