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 | 3 |
| 2 | 20 |
| 3 | 246 |
| 4 | 4481 |
| 5 | 107129 |
| 6 | 3157836 |
| 7 | 110504876 |
| 8 | 4473749677 |
| 9 | 205615442135 |
| 10 | 10574135574388 |
| 11 | 601527803412298 |
| 12 | 37500537926181449 |
| 13 | 2542321872054610333 |
| 14 | 186209553386691383388 |
| 15 | 14653121207168215024624 |
| 16 | 1232879877057607865696085 |
| 17 | 110444572988776439826640683 |