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 | 19 |
| 1 | 723 |
| 2 | 27493 |
| 3 | 1045457 |
| 4 | 39754859 |
| 5 | 1511730099 |
| 6 | 57485498621 |
| 7 | 2185960677697 |
| 8 | 83123991251107 |
| 9 | 3160897628219763 |
| 10 | 120197233863602101 |
| 11 | 4570655784445099601 |
| 12 | 173805117042777386939 |
| 13 | 6609165103409985803283 |
| 14 | 251322079046622237911693 |
| 15 | 9556848168875055026447617 |