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 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 103 |
| 5 | 1097 |
| 6 | 1223 |
| 7 | 47273 |
| 8 | 556403 |
| 9 | 10661993 |
| 10 | 7281587 |
| 11 | 62929017101 |
| 12 | 7218065 |
| 13 | 60718862681977 |
| 14 | 595953719897 |
| 15 | 13324966405463 |
| 16 | 247016301114823 |
| 17 | 28505097599389815853 |
| 18 | 549689343118061 |
| 19 | 320305944459287485595917 |