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 | 46 |
| 2 | 698 |
| 3 | 5219 |
| 4 | 27246 |
| 5 | 115716 |
| 6 | 428949 |
| 7 | 1442005 |
| 8 | 4492529 |
| 9 | 13133871 |
| 10 | 36307595 |
| 11 | 95412314 |
| 12 | 239342404 |
| 13 | 575169570 |
| 14 | 1328404782 |
| 15 | 2957341785 |
| 16 | 6363295591 |
| 17 | 13266197675 |
| 18 | 26858140315 |
| 19 | 52913319943 |
| 20 | 101631438086 |
| 21 | 190636635796 |