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 | 1 |
| 3 | 3 |
| 4 | 27 |
| 5 | 531 |
| 6 | 1035 |
| 7 | 4635 |
| 8 | 6363 |
| 9 | 11475 |
| 10 | 19683 |
| 11 | 40131 |
| 12 | 80955 |
| 13 | 266475 |
| 14 | 280755 |
| 15 | 307395 |
| 16 | 356643 |
| 17 | 490371 |
| 18 | 544347 |
| 19 | 557955 |
| 20 | 565515 |
| 21 | 572715 |
| 22 | 808227 |
| 23 | 1256355 |
| 24 | 1695483 |
| 25 | 1959075 |
| 26 | 1995075 |
| 27 | 2771595 |
| 28 | 2837835 |
| 29 | 3004155 |
| 30 | 3208491 |
| 31 | 3337635 |
| 32 | 3886443 |
| 33 | 4670955 |
| 34 | 5619411 |
| 35 | 6434595 |
| 36 | 6942817 |