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 | 18 |
| 4 | 50 |
| 5 | 294 |
| 6 | 1210 |
| 7 | 1014 |
| 8 | 578 |
| 9 | 2166 |
| 10 | 58190 |
| 11 | 35322 |
| 12 | 28830 |
| 13 | 8214 |
| 14 | 16810 |
| 15 | 77658 |
| 16 | 5588770 |
| 17 | 219102 |
| 18 | 4239858 |
| 19 | 111630 |
| 20 | 1481370 |
| 21 | 1058610 |
| 22 | 31974 |
| 23 | 486798 |
| 24 | 2824490 |
| 25 | 871310 |
| 26 | 56454 |
| 27 | 102010 |
| 28 | 1082118 |
| 29 | 47330166 |
| 30 | 71286 |
| 31 | 536298 |
| 32 | 677418 |
| 33 | 6692790 |
| 34 | 638146 |
| 35 | 146646390 |
| 36 | 4928622 |