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 | 2 |
| 3 | 9 |
| 4 | 4 |
| 5 | 35 |
| 6 | 558 |
| 7 | 2205 |
| 8 | 8 |
| 9 | 135 |
| 10 | 137970 |
| 11 | 33 |
| 12 | 1068 |
| 13 | 545259 |
| 14 | 135926 |
| 15 | 138845925 |
| 16 | 16 |
| 17 | 527 |
| 18 | 2106 |
| 19 | 35288379945 |
| 20 | 2100 |
| 21 | 537075 |
| 22 | 8382 |
| 23 | 2093 |
| 24 | 4283544 |
| 25 | 1069975 |
| 26 | 130 |
| 27 | 2294286602622705 |
| 28 | 533820 |
| 29 | 133371 |
| 30 | 146557818382226310 |
| 31 | 585910928570692725 |
| 32 | 32 |
| 33 | 2079 |