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 | 11 |
| 3 | 13 |
| 4 | 59 |
| 5 | 582 |
| 6 | 12285 |
| 7 | 127893 |
| 8 | 654577 |
| 9 | 1896651 |
| 10 | 2083263 |
| 11 | 3828867 |
| 12 | 6195679 |
| 13 | 22339606 |
| 14 | 43877386 |
| 15 | 209882043 |
| 16 | 269091773 |
| 17 | 1585394894 |
| 18 | 2614512078 |
| 19 | 3726537414 |
| 20 | 4487682121 |
| 21 | 6296491774 |
| 22 | 8648456991 |
| 23 | 23933983277 |
| 24 | 174313954158 |
| 25 | 367633382556 |