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 | 41 |
| 2 | 1944 |
| 3 | 2000 |
| 4 | 3168 |
| 5 | 4180 |
| 6 | 13384 |
| 7 | 43780 |
| 8 | 143784 |
| 9 | 470352 |
| 10 | 1549756 |
| 11 | 5114352 |
| 12 | 16851668 |
| 13 | 55718276 |
| 14 | 183999596 |
| 15 | 607959912 |
| 16 | 2009783684 |
| 17 | 6640967048 |
| 18 | 21951863104 |
| 19 | 72556631720 |
| 20 | 239811612380 |
| 21 | 792682822452 |
| 22 | 2620034132264 |
| 23 | 8660100023060 |