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 | 20 |
| 3 | 21 |
| 4 | 220 |
| 5 | 320 |
| 6 | 132 |
| 7 | 1015 |
| 8 | 1016 |
| 9 | 81 |
| 10 | 1090 |
| 11 | 4070 |
| 12 | 516 |
| 13 | 2353 |
| 14 | 2534 |
| 15 | 1185 |
| 16 | 3760 |
| 17 | 3842 |
| 18 | 846 |
| 19 | 5662 |
| 20 | 14960 |
| 21 | 3738 |
| 22 | 7546 |
| 23 | 12857 |
| 24 | 7296 |
| 25 | 28825 |
| 26 | 25298 |
| 27 | 6885 |
| 28 | 39088 |
| 29 | 43877 |
| 30 | 78960 |
| 31 | 61969 |
| 32 | 78368 |
| 33 | 64977 |
| 34 | 98872 |
| 35 | 258965 |
| 36 | 69984 |
| 37 | 187849 |
| 38 | 367688 |
| 39 | 199758 |