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 | 6 |
| 3 | 45 |
| 4 | 60 |
| 5 | 90 |
| 6 | 420 |
| 7 | 630 |
| 8 | 1512 |
| 9 | 3780 |
| 10 | 5460 |
| 11 | 7560 |
| 12 | 8190 |
| 13 | 9100 |
| 14 | 15925 |
| 15 | 16632 |
| 16 | 27300 |
| 17 | 31500 |
| 18 | 40950 |
| 19 | 46494 |
| 20 | 51408 |
| 21 | 55125 |
| 22 | 64260 |
| 23 | 66528 |
| 24 | 81900 |
| 25 | 87360 |
| 26 | 95550 |
| 27 | 143640 |
| 28 | 163800 |
| 29 | 172900 |
| 30 | 185976 |
| 31 | 232470 |
| 32 | 257040 |
| 33 | 330750 |
| 34 | 332640 |
| 35 | 464940 |
| 36 | 565488 |
| 37 | 598500 |
| 38 | 646425 |
| 39 | 661500 |