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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 18 |
| 6 | 26 |
| 7 | 70 |
| 8 | 82 |
| 9 | 222 |
| 10 | 642 |
| 11 | 1902 |
| 12 | 5682 |
| 13 | 17022 |
| 14 | 51042 |
| 15 | 59778 |
| 16 | 59958 |
| 17 | 77774 |
| 18 | 107258 |
| 19 | 268870 |
| 20 | 285010 |
| 21 | 361086 |
| 22 | 930666 |
| 23 | 1084314 |
| 24 | 1498134 |
| 25 | 3813282 |
| 26 | 5053994 |
| 27 | 13240150 |
| 28 | 14183598 |
| 29 | 15487758 |
| 30 | 15579122 |
| 31 | 18418666 |
| 32 | 18622506 |
| 33 | 23809998 |
| 34 | 58728474 |
| 35 | 64572254 |
| 36 | 65013058 |