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 | 3 |
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 8 |
| 5 | 12 |
| 6 | 39 |
| 7 | 30 |
| 8 | 48 |
| 9 | 140 |
| 10 | 168 |
| 11 | 200 |
| 12 | 576 |
| 13 | 522 |
| 14 | 1128 |
| 15 | 2688 |
| 16 | 2208 |
| 17 | 3572 |
| 18 | 12960 |
| 19 | 9350 |
| 20 | 17296 |
| 21 | 44520 |
| 22 | 54208 |
| 23 | 64680 |
| 24 | 158976 |
| 25 | 186048 |
| 26 | 361928 |
| 27 | 809200 |
| 28 | 826728 |
| 29 | 1169400 |
| 30 | 4131036 |
| 31 | 3010350 |
| 32 | 4876416 |
| 33 | 13862800 |
| 34 | 17256768 |
| 35 | 23639040 |
| 36 | 59720832 |
| 37 | 54018522 |
| 38 | 116538408 |
| 39 | 251395200 |
| 40 | 233917632 |
| 41 | 370248452 |
| 42 | 1319232096 |