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 | 1 |
| 1 | 11 |
| 2 | 63 |
| 3 | 255 |
| 4 | 825 |
| 5 | 2277 |
| 6 | 5577 |
| 7 | 12441 |
| 8 | 25740 |
| 9 | 50050 |
| 10 | 92378 |
| 11 | 163098 |
| 12 | 277134 |
| 13 | 455430 |
| 14 | 726750 |
| 15 | 1129854 |
| 16 | 1716099 |
| 17 | 2552517 |
| 18 | 3725425 |
| 19 | 5344625 |
| 20 | 7548255 |
| 21 | 10508355 |
| 22 | 14437215 |
| 23 | 19594575 |
| 24 | 26295750 |
| 25 | 34920756 |
| 26 | 45924516 |
| 27 | 59848228 |
| 28 | 77331980 |
| 29 | 99128700 |
| 30 | 126119532 |
| 31 | 159330732 |
| 32 | 199952181 |
| 33 | 249357615 |