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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 11 |
| 6 | 19 |
| 7 | 29 |
| 8 | 105 |
| 9 | 298 |
| 10 | 671 |
| 11 | 1299 |
| 12 | 3997 |
| 13 | 12468 |
| 14 | 33083 |
| 15 | 75781 |
| 16 | 220625 |
| 17 | 708867 |
| 18 | 2086183 |
| 19 | 5412778 |
| 20 | 15756741 |
| 21 | 51093316 |
| 22 | 160523859 |
| 23 | 457283931 |
| 24 | 1365001273 |
| 25 | 4458076176 |
| 26 | 14608351135 |
| 27 | 44649287452 |
| 28 | 137979763181 |
| 29 | 455582050840 |
| 30 | 1536403659211 |
| 31 | 4953147876189 |