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 | 5 |
| 3 | 15 |
| 4 | 40 |
| 5 | 98 |
| 6 | 237 |
| 7 | 534 |
| 8 | 1185 |
| 9 | 2554 |
| 10 | 5391 |
| 11 | 11117 |
| 12 | 22556 |
| 13 | 44858 |
| 14 | 88000 |
| 15 | 170107 |
| 16 | 324547 |
| 17 | 611755 |
| 18 | 1140382 |
| 19 | 2103554 |
| 20 | 3842826 |
| 21 | 6955918 |
| 22 | 12483075 |
| 23 | 22220002 |
| 24 | 39248230 |
| 25 | 68819781 |
| 26 | 119839422 |
| 27 | 207304370 |
| 28 | 356356801 |
| 29 | 608901907 |
| 30 | 1034452712 |
| 31 | 1747764522 |
| 32 | 2937370605 |
| 33 | 4911675955 |
| 34 | 8173032301 |