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) |
|---|---|
| 2 | 31 |
| 3 | 241 |
| 4 | 1021 |
| 5 | 3121 |
| 6 | 7759 |
| 7 | 16787 |
| 8 | 32749 |
| 9 | 59029 |
| 10 | 99991 |
| 11 | 161047 |
| 12 | 248827 |
| 13 | 371291 |
| 14 | 537811 |
| 15 | 759371 |
| 16 | 1048573 |
| 17 | 1419839 |
| 18 | 1889561 |
| 19 | 2476081 |
| 20 | 3199997 |
| 21 | 4084081 |
| 22 | 5153623 |
| 23 | 6436327 |
| 24 | 7962607 |
| 25 | 9765619 |
| 26 | 11881357 |
| 27 | 14348891 |
| 28 | 17210353 |
| 29 | 20511143 |
| 30 | 24299981 |