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 | 9 |
| 2 | 15 |
| 3 | 21 |
| 4 | 309 |
| 5 | 441 |
| 6 | 1611 |
| 7 | 2955 |
| 8 | 3081 |
| 9 | 3879 |
| 10 | 5529 |
| 11 | 7209 |
| 12 | 7755 |
| 13 | 7875 |
| 14 | 13761 |
| 15 | 15015 |
| 16 | 15729 |
| 17 | 16659 |
| 18 | 21561 |
| 19 | 22155 |
| 20 | 35595 |
| 21 | 37059 |
| 22 | 38199 |
| 23 | 45291 |
| 24 | 50049 |
| 25 | 51429 |
| 26 | 59619 |
| 27 | 63855 |
| 28 | 67215 |
| 29 | 67941 |
| 30 | 71331 |
| 31 | 72891 |
| 32 | 83061 |
| 33 | 96459 |
| 34 | 96909 |
| 35 | 102795 |
| 36 | 106959 |
| 37 | 111495 |