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 | 19 |
| 3 | 415 |
| 4 | 10147 |
| 5 | 261331 |
| 6 | 7100821 |
| 7 | 200148649 |
| 8 | 5796870115 |
| 9 | 171475190227 |
| 10 | 5158851352489 |
| 11 | 157366288875709 |
| 12 | 4855940642591941 |
| 13 | 151309409779981285 |
| 14 | 4754260599949620163 |
| 15 | 150466404665460290335 |
| 16 | 4792275283921293214435 |