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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 73 |
| 3 | 1045 |
| 4 | 7445 |
| 5 | 35570 |
| 6 | 130826 |
| 7 | 399738 |
| 8 | 1063290 |
| 9 | 2539515 |
| 10 | 5564515 |
| 11 | 11362351 |
| 12 | 21875503 |
| 13 | 40068860 |
| 14 | 70321460 |
| 15 | 118921460 |
| 16 | 194681076 |
| 17 | 309689493 |
| 18 | 480223005 |
| 19 | 727832905 |
| 20 | 1080632905 |
| 21 | 1574809126 |
| 22 | 2256376958 |
| 23 | 3183210350 |
| 24 | 4427370350 |
| 25 | 6077760975 |
| 26 | 8243141751 |