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 | 6 |
| 3 | 35 |
| 4 | 190 |
| 5 | 1015 |
| 6 | 5304 |
| 7 | 27417 |
| 8 | 142142 |
| 9 | 736782 |
| 10 | 3816852 |
| 11 | 19774690 |
| 12 | 102446730 |
| 13 | 530743749 |
| 14 | 2749606626 |
| 15 | 14244797910 |