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 | 4 |
| 3 | 9 |
| 4 | 24 |
| 5 | 35 |
| 6 | 138 |
| 7 | 133 |
| 8 | 528 |
| 9 | 855 |
| 10 | 2550 |
| 11 | 2057 |
| 12 | 12708 |
| 13 | 8203 |
| 14 | 45178 |
| 15 | 78645 |
| 16 | 182816 |
| 17 | 131087 |
| 18 | 933966 |
| 19 | 524305 |
| 20 | 3698220 |
| 21 | 4890627 |
| 22 | 13345794 |
| 23 | 8388629 |
| 24 | 67390440 |
| 25 | 60129575 |
| 26 | 225470518 |
| 27 | 279938133 |
| 28 | 1032462228 |
| 29 | 536870939 |
| 30 | 5018059170 |