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 | 10 |
| 2 | 100 |
| 3 | 292 |
| 4 | 870 |
| 5 | 2446 |
| 6 | 6952 |
| 7 | 20168 |
| 8 | 57838 |
| 9 | 164914 |
| 10 | 473632 |
| 11 | 1360740 |
| 12 | 3896086 |
| 13 | 11165294 |
| 14 | 32038792 |
| 15 | 91859552 |
| 16 | 263284722 |
| 17 | 754983634 |
| 18 | 2164966616 |
| 19 | 6206791972 |
| 20 | 17795617610 |
| 21 | 51026354878 |
| 22 | 146302277604 |
| 23 | 419468202104 |
| 24 | 1202710746958 |