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 | 28 |
| 3 | 244 |
| 4 | 1244 |
| 5 | 4619 |
| 6 | 13880 |
| 7 | 35832 |
| 8 | 82488 |
| 9 | 173613 |
| 10 | 339988 |
| 11 | 627484 |
| 12 | 1102036 |
| 13 | 1855607 |
| 14 | 3013232 |
| 15 | 4741232 |
| 16 | 7256688 |
| 17 | 10838265 |
| 18 | 15838476 |
| 19 | 22697476 |
| 20 | 31958476 |
| 21 | 44284867 |
| 22 | 60479144 |
| 23 | 81503720 |
| 24 | 108503720 |
| 25 | 142831845 |
| 26 | 186075396 |
| 27 | 240085548 |
| 28 | 307008964 |
| 29 | 389321839 |