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 | 0 |
| 2 | 30 |
| 3 | 91 |
| 4 | 140 |
| 5 | 330 |
| 6 | 630 |
| 7 | 840 |
| 8 | 1540 |
| 9 | 3900 |
| 10 | 6090 |
| 11 | 6930 |
| 12 | 9180 |
| 13 | 9455 |
| 14 | 9750 |
| 15 | 10920 |
| 16 | 18564 |
| 17 | 22770 |
| 18 | 42900 |
| 19 | 46200 |
| 20 | 56730 |
| 21 | 56925 |
| 22 | 58905 |
| 23 | 106260 |
| 24 | 116886 |
| 25 | 128520 |
| 26 | 145530 |
| 27 | 189420 |
| 28 | 191730 |
| 29 | 214200 |
| 30 | 215600 |
| 31 | 242550 |
| 32 | 264740 |
| 33 | 300300 |
| 34 | 308880 |
| 35 | 341880 |
| 36 | 356265 |
| 37 | 364650 |
| 38 | 377910 |
| 39 | 383180 |
| 40 | 399000 |