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 | 1 |
| 2 | 616 |
| 3 | 9573 |
| 4 | 230726 |
| 5 | 4934366 |
| 6 | 104434119 |
| 7 | 2222033208 |
| 8 | 47581843251 |
| 9 | 1020963792078 |
| 10 | 21891250379251 |
| 11 | 469088799364095 |
| 12 | 10050616587252213 |
| 13 | 215366263056062190 |
| 14 | 4615153893061065333 |
| 15 | 98898611652123318575 |