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 | 7 |
| 2 | 19 |
| 3 | 43 |
| 4 | 73 |
| 5 | 349 |
| 6 | 661 |
| 7 | 8629 |
| 8 | 13399 |
| 9 | 14629 |
| 10 | 24421 |
| 11 | 62299 |
| 12 | 187909 |
| 13 | 688453 |
| 14 | 850351 |
| 15 | 17382481 |
| 16 | 30752233 |
| 17 | 32822371 |
| 18 | 136283431 |
| 19 | 248641039 |
| 20 | 255949951 |
| 21 | 390817729 |
| 22 | 698542489 |
| 23 | 1256735191 |
| 24 | 1535220499 |
| 25 | 1899797989 |
| 26 | 2466641071 |
| 27 | 4289385523 |
| 28 | 24215097499 |
| 29 | 42441715489 |
| 30 | 43725662623 |