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 | 39 |
| 3 | 511 |
| 4 | 2359 |
| 5 | 12621 |
| 6 | 19929 |
| 7 | 101179 |
| 8 | 149943 |
| 9 | 368089 |
| 10 | 492219 |
| 11 | 1611831 |
| 12 | 1205449 |
| 13 | 4457701 |
| 14 | 3945981 |
| 15 | 6449331 |
| 16 | 9588151 |
| 17 | 22722609 |
| 18 | 14355471 |
| 19 | 44576623 |
| 20 | 29772939 |
| 21 | 51702469 |
| 22 | 62861409 |
| 23 | 141611691 |
| 24 | 76620873 |
| 25 | 196890121 |
| 26 | 173850339 |
| 27 | 268218727 |
| 28 | 238681261 |
| 29 | 574336533 |
| 30 | 251523909 |