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) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 5 |
| 3 | 29 |
| 4 | 34 |
| 5 | 63 |
| 6 | 286 |
| 7 | 349 |
| 8 | 635 |
| 9 | 5429 |
| 10 | 6064 |
| 11 | 90325 |
| 12 | 96389 |
| 13 | 1054215 |
| 14 | 2204819 |
| 15 | 3259034 |
| 16 | 15240955 |
| 17 | 186150494 |
| 18 | 387541943 |
| 19 | 1348776323 |
| 20 | 3085094589 |
| 21 | 4433870912 |
| 22 | 16386707325 |
| 23 | 69980700212 |
| 24 | 86367407537 |
| 25 | 156348107749 |
| 26 | 399063623035 |
| 27 | 5743238830239 |
| 28 | 17628780113752 |