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 | 1 |
| 3 | 4 |
| 4 | 5 |
| 5 | 20 |
| 6 | 36 |
| 7 | 61 |
| 8 | 244 |
| 9 | 504 |
| 10 | 576 |
| 11 | 1385 |
| 12 | 5540 |
| 13 | 11916 |
| 14 | 17280 |
| 15 | 14400 |
| 16 | 50521 |
| 17 | 202084 |
| 18 | 442224 |
| 19 | 697536 |
| 20 | 792000 |
| 21 | 518400 |
| 22 | 2702765 |
| 23 | 10811060 |
| 24 | 23870196 |
| 25 | 39202560 |
| 26 | 50198400 |
| 27 | 47174400 |
| 28 | 25401600 |
| 29 | 199360981 |
| 30 | 797443924 |
| 31 | 1769923944 |