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 | 8 |
| 3 | 35 |
| 4 | 91 |
| 5 | 405 |
| 6 | 1069 |
| 7 | 3799 |
| 8 | 8686 |
| 9 | 36744 |
| 10 | 86310 |
| 11 | 235776 |
| 12 | 686329 |
| 13 | 1605779 |
| 14 | 5230579 |
| 15 | 13191702 |
| 16 | 30608501 |
| 17 | 73907925 |
| 18 | 206052723 |
| 19 | 433747560 |
| 20 | 1324608945 |
| 21 | 2995740974 |
| 22 | 6973434054 |
| 23 | 15364943439 |
| 24 | 35816669079 |
| 25 | 86662644756 |
| 26 | 184871083828 |
| 27 | 502089539734 |
| 28 | 1098571699830 |