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 | 10 |
| 2 | 34 |
| 3 | 250 |
| 4 | 1954 |
| 5 | 15370 |
| 6 | 120994 |
| 7 | 952570 |
| 8 | 7499554 |
| 9 | 59043850 |
| 10 | 464851234 |
| 11 | 3659766010 |
| 12 | 28813276834 |
| 13 | 226846448650 |
| 14 | 1785958312354 |
| 15 | 14060820050170 |
| 16 | 110700602088994 |
| 17 | 871543996661770 |
| 18 | 6861651371205154 |
| 19 | 54021666972979450 |
| 20 | 425311684412630434 |
| 21 | 3348471808328064010 |
| 22 | 26362462782211881634 |