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 | 3340 |
| 2 | 11752 |
| 3 | 42653 |
| 4 | 155144 |
| 5 | 564600 |
| 6 | 2036844 |
| 7 | 7323894 |
| 8 | 26452984 |
| 9 | 95690028 |
| 10 | 345980784 |
| 11 | 1250385422 |
| 12 | 4516046380 |
| 13 | 16313317592 |
| 14 | 58952879320 |
| 15 | 213036643465 |
| 16 | 769783313248 |
| 17 | 2781411265212 |
| 18 | 10049660711008 |
| 19 | 36312457046956 |
| 20 | 131210437887132 |
| 21 | 474105380419912 |
| 22 | 1713085295392596 |