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 | 1 |
| 1 | 5 |
| 2 | 85 |
| 3 | 1751 |
| 4 | 38165 |
| 5 | 856945 |
| 6 | 19611175 |
| 7 | 454805755 |
| 8 | 10651488789 |
| 9 | 251345549849 |
| 10 | 5966636799745 |
| 11 | 142330448514875 |
| 12 | 3408895901222375 |
| 13 | 81922110160246231 |
| 14 | 1974442362935339179 |
| 15 | 47705925773278538281 |
| 16 | 1155170746105476171285 |
| 17 | 28025439409568101909625 |
| 18 | 681077893998769910221225 |