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 | 121 |
| 2 | 451 |
| 3 | 1331 |
| 4 | 1681 |
| 5 | 4961 |
| 6 | 14641 |
| 7 | 18491 |
| 8 | 45221 |
| 9 | 48851 |
| 10 | 54571 |
| 11 | 68921 |
| 12 | 125521 |
| 13 | 158521 |
| 14 | 161051 |
| 15 | 168551 |
| 16 | 182081 |
| 17 | 203401 |
| 18 | 452551 |
| 19 | 455521 |
| 20 | 467851 |
| 21 | 485221 |
| 22 | 497431 |
| 23 | 537361 |
| 24 | 590851 |
| 25 | 600281 |
| 26 | 758131 |
| 27 | 1380731 |
| 28 | 1686781 |
| 29 | 1697851 |
| 30 | 1743731 |
| 31 | 1771561 |