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 | 14 |
| 2 | 125 |
| 3 | 910 |
| 4 | 5901 |
| 5 | 35574 |
| 6 | 204205 |
| 7 | 1132670 |
| 8 | 6129101 |
| 9 | 32566534 |
| 10 | 170691885 |
| 11 | 885423630 |
| 12 | 4556561101 |
| 13 | 23305343894 |
| 14 | 118631189165 |
| 15 | 601616805790 |
| 16 | 3042056477901 |
| 17 | 15346559343654 |
| 18 | 77279066272045 |
| 19 | 388583895311150 |
| 20 | 1951684190615501 |
| 21 | 9793511186181814 |
| 22 | 49108010998116525 |