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 | 13 |
| 2 | 37 |
| 3 | 139 |
| 4 | 271 |
| 5 | 547 |
| 6 | 4801 |
| 7 | 7561 |
| 8 | 12841 |
| 9 | 14701 |
| 10 | 358201 |
| 11 | 678481 |
| 12 | 16139971 |
| 13 | 22934101 |
| 14 | 55058581 |
| 15 | 59553721 |
| 16 | 74371321 |
| 17 | 113068381 |
| 18 | 116605861 |
| 19 | 242699311 |
| 20 | 997521211 |
| 21 | 1592680321 |
| 22 | 1652749201 |
| 23 | 3190927741 |
| 24 | 5088964801 |
| 25 | 6974736757 |
| 26 | 9214178821 |