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 | 6 |
| 2 | 30 |
| 3 | 60 |
| 4 | 210 |
| 5 | 210 |
| 6 | 180 |
| 7 | 630 |
| 8 | 330 |
| 9 | 1320 |
| 10 | 1560 |
| 11 | 2340 |
| 12 | 990 |
| 13 | 2730 |
| 14 | 840 |
| 15 | 4620 |
| 16 | 3570 |
| 17 | 5610 |
| 18 | 4290 |
| 19 | 1710 |
| 20 | 7980 |
| 21 | 2730 |
| 22 | 6630 |
| 23 | 10920 |
| 24 | 12540 |
| 25 | 4080 |
| 26 | 8970 |
| 27 | 14490 |
| 28 | 18480 |
| 29 | 9690 |
| 30 | 3900 |
| 31 | 11550 |
| 32 | 25200 |
| 33 | 26910 |
| 34 | 30600 |
| 35 | 34650 |
| 36 | 32130 |
| 37 | 37050 |
| 38 | 7980 |
| 39 | 23460 |
| 40 | 6090 |
| 41 | 29580 |
| 42 | 49140 |
| 43 | 35700 |