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 | 4 |
| 2 | 53122 |
| 3 | 412441 |
| 4 | 2360934421 |
| 5 | 2982905123 |
| 6 | 1968515515 |
| 7 | 8282454457 |
| 8 | 17281502461 |
| 9 | 88998294238681 |
| 10 | 858342429826762 |
| 11 | 2350396241873433799 |
| 12 | 25572406084465911331237801 |
| 13 | 52170015710352407496920694341 |
| 14 | 798986767053692909522422712521 |
| 15 | 718154384550161644441959876349 |